The absolute value of a number is always positive or zero because it represents the distance of a number from zero on a number line, and the distance between two points can never be negative.
The absolute value of a number is defined as the distance of that number from zero, regardless of its sign. For example, the absolute value of -5 is 5 and the absolute value of 5 is also 5. When we apply the absolute value function to a number, the result is always positive or zero.
Additionally, the definition of absolute value is |x| = { x if x >=0, -x if x<0 }
if x is greater or equal to 0, the absolute value of x is x, otherwise is -x, which is positive.
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The only creation to have a living soul is people.
True or False
..................false
A scale drawing of a rectangular park had a scale of 1 cm = 60 m
What is the actual perimeter of the park in meters?
an object is moving at the constant rate of 32 feet per second. how many yards will it travel in one minute?
The object will travel 639.36 yards in one minute.
Formula: Yards = Feet x 0.3333
The question is asking how many yards an object will travel in one minute when it is moving at a constant rate of 32 feet per second.
We can use the formula above to calculate the number of yards the object will travel in one minute. We know that the object is traveling at a rate of 32 feet per second. To find the number of yards traveled in one minute, we need to multiply 10.6667 yards per second by 60 seconds in a minute. Therefore, in one minute (60 seconds), the object will travel 32 x 60 = 1920 feet. We can now use the formula to convert this to yards: Yards = 1920 x 0.3333 = 639.36 yards. Therefore, the object will travel 639.36 yards in one minute.
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Can you come up with the equation for the graph to the left in y = mx+ b form?
Answer:
y = 3x + 1
Step-by-step explanation:
the equation of a line in slope- intercept form is
y = mx + b ( m is the slope and b the y- intercept )
calculate m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (0, 1) and (x₂, y₂ ) = (1, 4) ← 2 points on the line
m = [tex]\frac{4-1}{1-0}[/tex] = [tex]\frac{3}{1}[/tex] = 3
the line crosses the y- axis at (0, 1 ) ⇒ c = 1
y = 3x + 1 ← equation of line
18. If 5 men can erect 2 cottages in 21days, how many more men, working at the same rate will be needed to erect 2 cottages in the same period?
The number of extra men required to erect 2 additional cottages is; 5 men
How to solve proportion problems?Let us use;
M = men
D = Days
C = Cottages
Thus;
5M * 21D = 2C
105MD = 2C
To erect 2 cottages in 21days, 5 men are required
To erect 2 more cottages or 4 cottages in 21 days;
(4 * 5)/2 = 10 men
Thus, we conclude that is the number of men required to erect 2 additional cottages which is 5 extra men
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find the area of the surface. z = 2 3 x3/2 + y3/2 , 0 ≤ x ≤ 1, 0 ≤ y ≤ 1
The area of the surface is S = [tex]\frac{-4}{15}(-1+8\sqrt{2}-9\sqrt{3} )[/tex]
Now, According to the question:
The given equation is:
[tex]z = \frac{2}{3}(x^\frac{3}{2}+y^\frac{3}{2} )[/tex],
0 ≤ x ≤ 1 , 0 ≤ y ≤ 1
Let's know:
Surface Area:
To surface area of a solid E, defined by z = f(x , y) can be found by integrating[tex]\int\limits \int\limits_R \sqrt{(z_x)^2+(z_y)^2+1},dA[/tex] where R is the rectangular region
[0,1] × [0, 1] and [tex]z_x,z_y[/tex] corresponds to the partials of z w.r.t x and y.
Now,
[tex]\sqrt{(z_x)^2+(z_y)^2+1}[/tex] = [tex]\sqrt{1+(\sqrt{x} )^2+(\sqrt{y} )^2}[/tex] = [tex]\sqrt{1+x+y}[/tex]
S = [tex]\int\limits \int\limits_R \sqrt{(z_x)^2+(z_y)^2+1},dA[/tex]
= [tex]\int\limits^1_0\int\limits^1_0 \sqrt{x+y+1}dy dx[/tex]
[Integrate with respect to y ]
= [tex]\int\limits^1_0 (\frac{2}{3}(x + y + 1)^\frac{3}{2} )|^1_0 dx[/tex]
= [tex]\int\limits^1_0 (\frac{2}{3}(x + (1) + 1)^\frac{3}{2}-\frac{2}{3}(x + (0) + 1)^\frac{3}{2} )dx[/tex]
= [tex]\int\limits^1_0 ((\frac{2}{3}(x +2)^\frac{3}{2} ) - (\frac{2}{3}(x +1)^\frac{3}{2} ) , dx[/tex]
= [tex]\int\limits^1_0 (\frac{2}{3}((x +2)^\frac{3}{2} - (x +1)^\frac{3}{2} )) , dx[/tex]
[Integrate with respect to x ]
= [tex]\frac{2}{3} (\frac{2}{5}(x + 2)^\frac{5}{2} - \frac{2}{5}(x +1)^\frac{5}{2} )|^1_0[/tex]
= [tex]\frac{2}{3}(\frac{2}{5}((1)+2 )^\frac{5}{2}-\frac{2}{5}((1)+1)^\frac{5}{2})-\frac{2}{3}(\frac{2}{5}((0)+2 )^\frac{5}{2} -\frac{2}{5}((0)+1)^\frac{5}{2}[/tex]
= [tex]\frac{2}{3}(\frac{18\sqrt{3}}{5} -\frac{8\sqrt{2} }{5} )-\frac{2}{3} (\frac{8\sqrt{2} }{5} -\frac{2}{5} )[/tex]
= [tex]\frac{-4}{15}(-1+8\sqrt{2}-9\sqrt{3} )[/tex]
Hence, The area of the surface is S = [tex]\frac{-4}{15}(-1+8\sqrt{2}-9\sqrt{3} )[/tex]
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Quadrilateral TUVW is a rhombus. What is VW?
U
V
vw=
V
11w
W
w+20
T
Answer:
22
Step-by-step explanation:
All sides of a rhombus are congruent.
[tex]11w=w+20 \\ \\ 10w=20 \\ \\ w=2 \\ \\ \implies VW=2(11)=22[/tex]
What are the 5 system components?
System components in mathematics involves the study of equations and their solutions, shapes and their properties, rate of change and area under a curve, angles and their relationships, and the properties of numbers.
1. Algebra: This is the study of equations and their solutions, as well as the manipulation of symbols and operations.
2. geometry: This involves the study of shapes and the properties of space, such as angles and distances.
3. Calculus: This involves understanding the rate of change of a function and the area under a curve.
4. Trigonometry: This involves the study of angles and their relationships to one another and to other types of measurements.
5. Number Theory: This involves the study of the properties of numbers, such as divisibility, primes, and multiplicative functions.
System components in mathematics involves the study of equations and their solutions, shapes and their properties, rate of change and area under a curve, angles and their relationships, and the properties of numbers.
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Can someone please give me a real answer, I’ll give you brainliest aswell!!!
Answer:
See attachment.
Step-by-step explanation:
If CD and MB are parallel, triangle CDE is similar to triangle MBE.
In similar triangles, corresponding sides are always in the same ratio.
[tex]\implies \sf CD:MB=DE:BE=EC:EM[/tex]
From inspection of the given diagram, EM is approximately 0.35 times the length of EC. Therefore, let EC = 10 and EM = 3.5.
The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.
Therefore, let CD = 7 and let DE = 12.
Substitute these values into the created ratio equation:
[tex]\implies \sf 7:MB=12:BE=10:3.5[/tex]
[tex]\implies \sf \dfrac{7}{MB}=\dfrac{12}{BE}=\dfrac{10}{3.5}[/tex]
Calculate BE:
[tex]\implies \sf \dfrac{12}{BE}=\dfrac{10}{3.5}[/tex]
[tex]\implies \sf \dfrac{12 \cdot 3.5}{10}=BE[/tex]
[tex]\implies \sf BE=4.2[/tex]
Calculate MB:
[tex]\implies \sf \dfrac{7}{MB}=\dfrac{10}{3.5}[/tex]
[tex]\implies \sf \dfrac{7 \cdot 3.5}{10}=MB[/tex]
[tex]\implies \sf MB=2.45[/tex]
Therefore:
[tex]\implies \sf CM=EC-EM[/tex]
[tex]\implies \sf CM=10-3.5[/tex]
[tex]\implies \sf CM=6.5[/tex]
[tex]\implies \sf DB=DE-BE[/tex]
[tex]\implies \sf DB=12-4.2[/tex]
[tex]\implies \sf DB=7.8[/tex]
how long must a driver take to drive the last 50 miles of a 120 mile trip if he wants to average 50 mph for the entire trip and it took 90 minutes to drive the first 70 miles?
Therefore , the solution of the given problem of speed comes out to be
he needs to drive at 77.77 mph.
Specify the speed.How quickly something is traveling is determined by its speed from a distance. How far an object moves in a certain length of time depends on its speed. Speed is calculated as follows: velocity = range x time. The most used units for expressing speed are meters per second (m/s), kilometers per hour (km/h), and kilometers per second (mph) (mph).
Here,
70 + 50 = 120 miles is indeed the total distance.
You would need 2.4 hours to travel the 120 miles at such an approximate speed of 50 mph.
However, you are already on the road for 1.5 hours, so you must finish the trip in 0.9 hours.
You need to travel at a speed of 77.77 mph to complete the final 70 miles approximately 0.9 hours.
Therefore , the solution of the given problem of speed comes out to be
he needs to drive at 77.77 mph.
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Determine zα for the following. (Round your answers to two decimal places.)
(a) α = 0.0089
(b) α = 0.09
(c) α = 0.707
Please explain where and how you got the answer.
Thank you.
The value of zα for the following is :
(a) α = 0.0089 is 2.37
(b) α = 0.09 is 1.34
(c) α = 0.707 is -0.545
zα is the inverse function of the standard normal CDF.
(a) Central limit c= 1-α
for α = 0.0089 , c=1-0.0089
∴ c=0.9911
Hence confidence level in percentage= 99.5%
Now, the value of zα will be calculated with the help of an excel sheet function normsinv(c).
∴zα = normsinv(c)
where c is central limit
zα = normsinv(0.9911)
zα =2.37
(b) Central limit c= 1-α
for α = 0.09 , c=1-0.09
∴ c=0.91
Hence confidence level in percentage= 91%
Now, the value of zα will be calculated with the help of an excel sheet function normsinv(c).
∴zα = normsinv(c)
where c is central limit
zα = normsinv(0.91)
zα=1.34
(c) Central limit c= 1-α
for α = 0.707 , c=1-0.707
∴ c=0.293
Hence confidence level in percentage= 29.3%
Now, the value of zα will be calculated with the help of an excel sheet function normsinv(c).
∴zα = normsinv(c)
where c is central limit
zα = normsinv(0.707)
zα= -0.545
Therefore zα value for 0.0089 is 2.37, for 0.09 is 1.34 and for 0.707 it is -0.545.
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problem 2 the losing team of each game is eliminated from the tournament. if sixteen teams compete, how many games will be played to determine the winner?
If sixteen teams compete, the winner will be decided after 15 games.
Since there are 16 teams and each team is playing with some of the other, there are 16/2 =8 pairs
Out of each pair only one team will move on.
So, there are 8 teams left after the first round.
These 8 teams pair up to have 8/2 =4 pairings
Continuing this process, we get the total number of games played to determine the winner is,
8+4+2+1=15
Each game's losing team gets eliminated from the tournament. If sixteen teams participate, the winner will be decided after 15 games.
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let f(x, y) = 1/√x^2 + y^2. Compute a) ∇f(x, y).
On solving the provided question, we can say that the value of the function is f(x) = => f(x) = vf(x,y) = (x² + y²) = (x² + y²),
What is function?fThe subject of mathematics includes quantities and their variations, equations and related structures, shapes and their locations, and places where they can be found. The term "function" refers to the relationship between a set of inputs, each of which has an associated output. A connection between inputs and outputs in which each input leads to a single, distinct result is known as a function. Each function is given a domain and a codomain, or scope. Usually, f is used to denote functions (x). input is an x. There are four main types of functions accessible. based on the following factors: on functions, one-to-one functions, many-to-one functions, inside functions, and on functions.
here, the function is f(x) =
f(x) =
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In a trapezoid $ABCD$ with $AB$ parallel to $CD$, the diagonals $AC$ and $BD$ intersect at $E$. If the area of triangle $ABE$ is 50 square units, and the area of triangle $ADE$ is 20 square units, what is the area of trapezoid $ABCD$
The area of trapezoid ABCD is 98 square units.
How to find the area of trapezoid ABCD?Based on the data given, The area of ΔDBA = area of ΔADE + area of ΔABE = 20 + 50 = 70. So
area of Δ DBA = 0.5 sin DBA (AB x DB) = 70
sin DBA = 140 / ( AB x DB)
sin DBA = sin CDB
The area of ΔCDB would be 0.5 sin (DBA) (DB x DC)
The area of ΔCDB = 0.5 (140 / [(AB x DB] ) (DB x DC)
The area of ΔCDB = 70 (DC/AB) = 70 ( DE /BE)
The area of ΔAEB would be 0.5 sin AEB ( AE * BE)
The area of ΔAEB = 50 (1)
Area Δ ADE would be 0.5 sin DEA (AE * DE)
Area Δ ADE = 20 (2)
Because of angle AEB is supplemental to angle DEA, their sines are equal. So
sin AEB = sin DEA
Let rearranging (1), (2). So we will have
sin AEB = sin DEA
100 / [ AE * BE] = 40 / [ AE * DE ]
DE / BE = 40/100 = 2/5
Since area of ΔCDB equal to 70 (DE / BE) then
ΔCDB = 70 (2/5) = 28
So...area of trapezoid ABCD = area of ΔDBA + area of ΔCDB
area of trapezoid ABCD = 70 + 28 = 98
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Given the formula for compound interest, calculate the amount of money Total in an account that pays 8% annual interest compounded quarterly and you invest $1200 for 5 years: ____A = P (1+r/n)mHow long will it take for the original amount of money to double to $2400?
A = P(1+r/n)(nt), where P is the original principal, r is the annual interest rate, n is the number of times the interest is compounded annually, and t is the number of years the money has been held, is the formula for compound interest.
To calculate the final amount of money in the account:
First, divide the 8% annual interest rate by 100 to get a decimal value: 0.08.
Find the number of times the interest is compounded annually. Since it is done quarterly, the answer is n = 4.
Put these values into the formula now, along with the $1200 principle sum and the number of years, 5, to complete it:
A = $1200(1+(0.08/4))^(4*5) = $2490.07
to determine how long it will take for the initial sum to double to $2400.
Divide the final sum by the starting sum: 2400/1200 = 2
Take the natural logarithm of 2: ln(2) = 0.693
Decimalize the result and divide it by the interest rate: 0.693 / 0.08 = 8.66 years
Therefore, the time it will take for the initial sum of money to double to $2400 is 8.66 years.
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CAN SOMEONE HELP ME PLEASE HURRY
Answer:
it would be the 3rd one I did this in middle school
Step-by-step explanation:
pls give brainly if It's right
Find the value of x.
Answers to all the questions form 1 to 10 are illustrated below.
What are the circumference and diameter of a circle?The circumference of a circle is the distance around the circle which is 2πr.
The diameter of a circle is the largest chord that passes through the center of a circle it is 2r.
We know the angle formed at the center of a circle is twice the angle formed at the circumference.
Answering each one in short.
1. x = 136/2 = 68°.
2. x = 146/2 = 73°.
3. x = 2×49 = 98°.
4. x = 2×62° = 124°.
5. As m∠O = 100°, x = 100/2 = 50°.
6. m∠O = 360 - 100 - 150 = 110°, x = 110/2 = 55°.
We know the angle formed by the same chords at the circumference is equal in measure.
7 . x = 18°.
8. x = 27°.
9. x = 180 - 55 - 90 = 35°.
10. x = 180 - 12 - 91 = 77°.
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an automobile manufacturer claims that their jeep has a 34.9 miles/gallon (mpg) rating. an independent testing firm has been contracted to test the mpg for this jeep. after testing 16 jeeps they found a mean mpg of 34.6 with a standard deviation of 2.0. is there sufficient evidence at the 0.025 level that the jeeps underperform the manufacturer's mpg rating? assume the population distribution is approximately normal. step 1 of 5 : state the null and alternative hypotheses.
Null Hypothesis: The jeeps have an mpg rating of 34.9
Alternative Hypothesis: The jeeps have an mpg rating that is less than 34.9
Calculate the test statistic.
Test Statistic = (Sample Mean - Population Mean) / (Standard Deviation / √Sample Size)
Test Statistic = (34.6 - 34.9) / (2.0 / √16)
Test Statistic = -1.5 / 0.5
Test Statistic = -3
Calculate the critical value.
Critical Value = -2.960 Compare the test statistic with the critical value
Test Statistic = -3
Critical Value = -2.960
Since the test statistic is lower than the critical value, we reject the null hypothesis.
Make a conclusion The jeeps have an mpg rating that is less than 34.9
At the 0.025 level, there is enough proof to conclude that Jeeps do not get the claimed mpg.
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$36\%$ of the letters in pythagoras's alphabet soup are vowels, and $33\frac13\%$ of those vowels are os. if pythagoras removes all the os from his soup, then $x\%$ of the original letters remain. what is $x$?
The value of x is: x=88.
Here, given that, 36% of the letters in Pythagoras's alphabet soup are vowels.
33 1/3% of those vowels are "os."
To calculate the percentage of letters that are "os," we first need to find 33 1/3% of 36%.
33 1/3% is equivalent to 1/3. So, we can calculate the percentage of "os" as follows:
Percentage of "os" = (36% * 1/3) = 12%
Now, we know that 12% of the letters in the soup are "os."
Next, Pythagoras removes all the "os" from his soup.
This means that what remains are the non-"os" letters, which are the remaining vowels and consonants.
To calculate the percentage of the original letters that remain, we need to subtract the percentage of "os" from 100%:
Percentage of original letters remaining = 100% - Percentage of "os"
Percentage of original letters remaining = 100% - 12% = 88%
Therefore, x% of the original letters remain, and x is equal to 88.
Hence, The value of x is: x=88.
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a researcher designs an experiment to test memory. he will test three groups of participants. group 1 will listen to a list of words. group 2 will read a list of words printed on paper. lastly, group 3 will hear and read the words. the researcher then tests the participants' memories to see how many words the members of each group can recall. to reduce experimenter and participant bias, what procedure must be used when choosing groups? deception naturalistic observation random assignment random sampling research accountability
Random mean assignment involves randomly assigning participants to different groups, so that each group is similar in terms of characteristics such as age, gender, race, etc. This ensures that the groups are as similar as possible, reducing the chance of bias in the experiment.
Random mean assignment is an important procedure used in experiments to reduce experimenter and participant bias. This involves randomly assigning participants to different groups in the experiment, so that the groups are as similar as possible in terms of characteristics such as age, gender, race, etc. This ensures that any differences observed in the results are due to the experimental variables, rather than any pre-existing differences between the groups. Random assignment also ensures that any experimenter bias is minimized, as the experimenter is not able to select which participants go into which group. Random assignment is therefore a key procedure used to reduce the chance of bias in experiments, and ensure that the results are more reliable and valid.
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At jaidee's printing company llc there are two kinds of printing presses: model a which can print 80 books per day and model b which can print 30 books per day. the company owns 13 total printing presses and this allows them to print 790 books per day. how many of each type of press do they have?
Jaidee's printing company LLC has 8 of Model A and 5 of Model B press, respectively.
We can find each type of press with the help of the substitution method.
Let Model A = x presses
Model B = y presses
According to the question, the company owns 13 total printing presses, then
x + y = 13
x = 13 - y
Also, according to the question
80x + 30y = 790
Put the value of x = 13 - y in the above equation
80(13 - y) + 30y = 790
1040 - 80y + 30y = 790
1040 - 790 = 80y - 30y
50y = 250
y = 250/50 = 5
Now, put the value of y in x = 13 - y
x = 13 - 5
x = 8
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George has opened a new store and he is monitoring its success closely.
He has found that this store’s revenue each month can be modeled by r(x)=x2+5x+14 where x represents the number of months since the store opens the doors and r(x) is measured in hundreds of dollars.
He has also found that his expenses each month can be modeled by c(x)=x2−3x+4 where x represents the number of months the store has been open and c(x) is measured in hundreds of dollars.
What does (r−c)(3) mean about George's new store?
Responses:
A) The new store will have a profit of $2400 after its third month in business.
B) The new store will sell 2400 items in its third month in business.
C) The new store will sell 3400 items in its third month in business.
D) The new store will have a profit of $3400 after its third month in business.
The new store will have a profit of $3400 after its third month in business.
The correct option is D.
What is a quadratic equation?For variable x : ax² + bx + c = 0, where a≠0 is a standard quadratic equation, which is a second-order polynomial equation in a single variable. It has at least one solution since it is a second-order polynomial equation, which is guaranteed by the algebraic basic theorem.
Given:
George has opened a new store, and he is monitoring its success closely.
He has found that this store’s revenue each month can be modeled by r(x)=x²+5x+14 where x represents the number of months since the store opens the doors and r(x) is measured in hundreds of dollars.
He has also found that his expenses each month can be modeled by c(x)=x²−3x+4 where x represents the number of months the store has been open and c(x) is measured in hundreds of dollars.
(r−c)(x) = x²+5x+14 -x²+3x-4
(r−c)(x) = 8x+10
(r−c)(3) = 24+10 = 34 in hundreds of dollars.
Therefore, the new store has profit of $3400.
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Use this number line to get the value of the given point
Answer:
1. Pt. A: -6 3. Pt. C: 3 5. Pt. E: 0
2. Pt. B: -2 4. Pt. D: 5
Step-by-step explanation:
By looking at the number line, you can see that a few points are labled from letter A to letter E.
In order to know the value of each point, you just have to look at their placement in the number line. For example, we can see that Point B is plotted at -2 on the number line, this means that the value of Point B is -2.
I hope this helps! :)
The total cost, in dollars, of an international call with duration x minutes is given by the expression
2.20 +0.35x. What is the total cost, in dollars, of an international call with a duration of 10
minutes?
Answer: total cost of an international call with a duration of 10 minutes is 5.70 dollars.
Step-by-step explanation:
The expression 2.20 +0.35x represents the total cost of an international call in dollars, as a function of the duration x in minutes.
It is composed of two parts:
The first part, 2.20$, represents the fixed cost of making an international call. This cost does not change regardless of the duration of the call.
The second part, 0.35x$, represents the variable cost of the call, which is based on the duration of the call in minutes. This cost increases with the duration of the call.
When x=10, it means the duration of the call is 10 minutes, so the variable cost of the call would be 0.35*10 = 3.5$
Therefore, the total cost of the international call with a duration of 10 minutes is 2.20 + 3.5 = 5.7$
It's important to notice that this equation represents the total cost of the call not just the variable cost, but also the fixed cost.
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What is an example of a ratio word problem?
John has 5 red balls and 8 blue balls. What is the ratio of red balls to blue balls? Answer: The ratio of red balls to blue balls is 5:8.
We can solve this problem by using a ratio. Ratios are two values that are compared to each other. In this case, we need to compare the number of red balls to the number of blue balls. We are given that there are 5 red balls and 8 blue balls. To find the ratio, we need to write the numbers as a fraction. The fraction for red balls is 5/8 and the fraction for blue balls is 8/5. We can then simplify the fractions to get the ratio of 5:8. This means that there is a ratio of 5 red balls to 8 blue balls.
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What is another name absolute value?
The absolute value is also called a modulus.
The absolute value (or modulus) | x | of a real number x is the non-negative value of x without regard to its sign, also describes the distance from zero that a number is on the number line, without considering direction.
It is represented as |a|, which defines the magnitude of any integer ‘a’.
Absolute value is a term used in mathematics to indicate the distance of a point or number from the origin (zero point) of a number line or coordinate system.
it defines removing any negative sign in front of a number and thinking of all numbers as positive.
When x itself is negative (x<0), then its absolute value is necessarily positive
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Combine as indicated by the signs.
2x/y²-x²- x/y - x
Answer: x(2 - xy² - y - y²)
---------------------------
y²
Step-by-step explanation:
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x(2 - xy² - y - y²)/y² is the answer
Answer:
(I'm not exactly sure which way you wanted it, so see the answers below!)
Step-by-step explanation:
5. A binary operation is defined on the set of real numbers by a*b = a + b - ab, where a, b£R.
(i) Determine whether or not * is distributive over ordinary addition (+) on R. on)
Answer:
isjsjdjejejrjebdkxn nsksksnenmdnxee nu pot snndnsnenenene
two planes start from los angeles international airport and fly in opposite directions. the second plane starts hour after the first plane, but its speed is 80 kilometers per hour faster. find the airspeed of each plane if 2 hours after the first plane departs the planes are 3200 kilometers apart.
The airspeed of each plane if 2 hours after the first plane departs the planes are 3200 kilometers apart.
speed of the first plane=1040km/hour
speed of the second plane=1120km/hour
Two planes start from Los Angeles International Airport and fly in opposite directions. The second plane starts 1 hour after the first plane, but its speed is 80 kilometers per hour faster. Find the airspeed of each plane if 2 hours after the first plane departs the planes are 3200 kilometers apart.
Make a system to solve.
let x=speed of the first plane
x+80=speed of the second plane
distance=speed*travel time
travel time of first plane=2 hour
travel time of second plane=1 hour
2x+1(x+80)=3200
2x+1x+80=3200
3x=3120
x=1040
x+80=1120
The airspeed of each plane if 2 hours after the first plane departs the planes are 3200 kilometers apart.
speed of the first plane=1040km/hour
speed of the second plane=1120km/hour
To know more about speed and time visit brainly.com/question/10566304
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The population of a town is 345,000. The function
f(t) = 345,000(1.2)^t gives the predicted population of the
town in t years. Approximately what will the population be
in 3 years?
Answer:
600,000
Step-by-step explanation:
The mathematical concept demonstrated in this question is the process of exponential growth. Exponential growth demonstrates an increase in quantity by a percentage or factor over time. It is represented by the general formula [tex]f(x) = a(1+r)^{x}[/tex] where a is the initial amount, r is the growth rate, and x is the time interval expressed as an integer.
For this problem, we can see that the initial population of the town is 345,000, and it increases by a rate of 20% each year. We can determine that the growth rate is 20% because 1 + r = 1.2, so r must be equal to .20 (or 20%). We are given that t = 3, so we can plug that value in to the function given.
f(3) = 345,000(1.2)³f(3) = 345,000(1.728)f(3) = 596,160We calculate the population in 3 years to be 596,160. This can be approximated to 600,000.
