Answer:
turning point = (- 2, - 7 )
Step-by-step explanation:
the vertex form of a parabola is
y = a(x - h)² + k
where (h, k ) are the coordinates of the turning point ( vertex) and a is a multiplier.
given
y = x² + 4x - 3
to complete the square
add/ subtract ( half the coefficient of the x- term)² to x² + 4x
y = x² + 2(2)x + 4 - 4 - 3
y = (x + 2)² - 7 ← in vertex form
with turning point (- 2, - 7 )
A hot air balloon rises 1,500 feet in 25 minutes. Which equation represents altitude (h) of the balloon over time (t)?
A) h = 60t
B) t = 1,500h
C) h = 1,500t
D) h = 60/t
The equation that represents the altitude h of the balloon over time.
h = 1500t.
Option B is the correct answer.
What is an equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
Example:
2x + 4 = 5 is an equation.
3x + 5x = 5 is an equation.
We have,
A hot air balloon rises 1,500 feet in 25 minutes.
This means,
25 minutes = 1,500 feet
h = altitude
The equation that represents the altitude h of the balloon over time.
h = 1500t.
Thus,
The equation that represents the altitude h of the balloon over time.
h = 1500t.
Option B is the correct answer.
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select each equation that the number 10 the power of 2
All the equations that have 10² = 100 as a solution are given as follows:
4.08x = 4080.97x = 97How to verify if 10² = 100 is a solution to the equation?We have to solve the equations and verify if the solution is equals to 100.
All the equations have the following format:
ax = b
Isolating the variable x, the solutions are given as follows:
x = b/a.
The first equation is:
0.031x = 31
The solution is:
x = 31/0.031 = 1000 = 10³.
The second equation is:
0.501x = 501
The solution is:
x = 501/0.501 = 1000 = 10³.
The third equation is:
4.08x = 408.
The solution is:
x = 408/4.08 = 100 = 10². (one of the correct options).
The fourth equation is:
0.97x = 97.
The solution is:
x = 97/0.97 = 100 = 10². (one of the correct options).
The fifth equation is:
0.55x = 550.
The solution is:
x = 550/0.55 = 1000 = 10³.
Missing informationThe equations are:
0.031x = 31.0.501x = 5014.08x = 408.0.97x = 97.0.55x = 550.The problem asks for which of these equations 10² = 100 is a solution.
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what is
1+3=
A.6
B.10
C.4
D.7
Answer:thhe one on top good
Step-by-step explanation:
NAROL is a long range hyperbolic navigation system. Suppose two NAROL transmitters are located at the
coordinates (-200, 0) and (200, 0), where unit distance on the coordinate plane is measured in miles. A
receiver is located somewhere in the first quadrant. The receiver computes that the difference in the distances
from the receiver to these transmitters is 160 miles.
What is the standard form of the hyperbola that the receiver sits on if the transmitters behave as foci of the
hyperbola?
Answer:
NORAL follows a hyperbolic path.
Equation of hyperbola; x²/6400 + y²/33600 = 1
Given,
The coordinates where the two NAROL transmitters are located = (-200, 0) and (200, 0)
The distance from receiver to these transmitters = 160 miles
We have to find the standard form of the hyperbola that the receiver sits on ;
Here,
The transmitters behave as foci of the hyperbola.
The center of hyperbola; (h, k) = (0, 0)
The distance from center to focal point,
c = 200
Square both sides
c² = 40,000
The distance from the receiver to the transmitters is given as:
2a = 160
Divide both sides by 2
a = 80
Square both sides
a² = 6400
We have:
b² = c² - a²
This gives
b² = 40000 - 6400
b² = 33600
The equation of a hyperbola is:
(x - h)²/a² + (y - k)²/b² = 1
So, we have:
(x - 0)²/6400 + (y - 0)²/33600 = 1
Therefore,
The equation of the hyperbola is:
x²/6400 + y²/33600 = 1
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How would you graph y =- 3x 7?.
Any algebraic expression can be represented graphically. The given problem can be solved as shown in the image attached.
A polynomial in one variable is also an algebraic expression. It can be written in the form aˣn. Here, n is a non-negative integer and a is a real number. The a is also called the coefficient of the term.
The given problem also consists of a polynomial in one variable. It can be solved as such.
We have been told that = y = -3x+7
We need to graph this. For this, we plot at least two values for x and y -
x = 0 and y = 7
x = 1 and y = 4
We plot both these coordinates on the graph which has been attached below.
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Faris has a box of 150 building blocks.
a) He uses some of the blocks to make a tower.
70 blocks are left over.
How many blocks has he used?
80 blocks
b) He uses the 70 blocks left over to make another two towers.
One tower takes 35 blocks and the other takes 20 blocks.
4
How many of the 70 blocks has he got left?
blocks
The value of the blocks he used is 80 blocks.
What is meant by mathematic expression?The difference is that expressions, which are essentially mathematical "phrases," do not contain an equal sign. Equations have an equal sign and demonstrate that two mathematical expressions are equivalent. An algebraic equation is 2x + b = 14, but 2x + b is an algebraic expression.
Arithmetic operations are the most fundamental type of mathematical expression. Any combination of numbers and a mathematical operation, such as multiplication, addition, subtraction, or division, are considered arithmetic operations.
Given ,
A)How many blocks has he used?
150-70
= 80
B) 35 - 20
= 15
70/15
= 4
Therefore the value of the blocks he used is 80 blocks
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how long the chord of the circle 4x²+4y²-8x-8y+3=0 whose the end point where the curve y=1/x cut the circle?
The length of the chord is 6
What is a circle simple definition?Simply said, a circle is a rounded form without any edges or line segments. It has the geometric form
What is the General Equation of Circle?The circle's general equation is written as follows: x2 + y2 + 2gx + 2fy + c = 0. The center of the circle in this general form of the equation of a circle is (-g, -f), and its radius is given by r = g2+f2cg2+f2c.
What is C in the General Equation of Circle?The circle's general equation is written as follows: x2 + y2 + 2gx + 2fy + c = 0. The coordinates of the circle's center and radius are determined using this general form. The equation in this case represents a circle that does not pass through the origin because c is a constant term.
We possess
4x2+4y2−12x+32y=27…(1)
We shall have y=0 when the specified circle intersects the x-axis, therefore
4x2+4y2−12x+32y=27
=>4x2−12x=27
=>4x2−12x−27=0…(2)
The answers to (2) are:
x1=−3/2
x2=9/2
Thus, the supplied circle intersects the x-axis at the following points:
A(−3/2,0) and B(9/2,0)
The length of the chord we want is defined as the distance d between these sites. The well-known formula for calculating the distance between points A and B is used to calculate the distance d:
d=root((9/2−(−3/2))^2+(0−0)^2)
√=6^2
=6
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HELP MEEEE I DONT UNDERSTAND PLS EXPLAIN
Answer:
y = 3x
Step-by-step explanation:
12x = 4y is the same as
4y = 12x Now divide both sides by 4
y = 3x
Identifying a Quotient on a Number Line
ABC
←
-12-10-8
D
-2 0246 8 10 12
Which point on the number line represents the quotient
12+-2?
O Point A
O Point B
O Point C
O Point D
Answer: C
Step-by-step explanation:
12 %- 2 = -6
hope this helps :)
A population has a mean of 180 and a standard deviation of 36. A sample of 84 observations will be taken. The probability that the sample mean will be between 181 and 185 is?.
The probability that the sample mean will be between 181 and 185 is 0.3039.
Given,
The mean of a population, μ = 180
Standard deviation, σ = 36
Number of sample observations, n = 84
We have to find the probability that the sample mean will be between 181 and 185;
Lets convert 181 and 185 into z scores;
z = (x - μ) / (σ/√n)
x = 181z = (181 - 180) / (36/√84)
z = 1/3.93
z = 0.25
x = 185z = (185 - 180) / (36/√84)
z = 5 / 3.93
z = 1.27
Lets look z score table;
The area to the left of z = 0.25 is 0.5987
The area to the left of z = 1.27 is 0.8980
The probability that the z is between 0.25 and 1.27 would be 0.8980 – 0.5887 = 0.3039.
That is,
The probability that the sample mean will be between 181 and 185 is 0.3039.
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Select the correct answer. For which system of inequalities is (3,-7) a solution? A. x + y < -4 3x + 2y < -5 B. x + y ≤ -4 3x + 2y < -5 C. x + y < -4 3x + 2y ≤ -5 D. x + y ≤ -4 3x + 2y ≤ -5
x + y ≤ -4 and 3x + 2y ≤ -5
======================================================
Explanation:
The given point has coordinates of x = 3 and y = -7.
Let's plug those coordinates into the first inequality of choice A.
x+y < -4
3 + (-7) < -4
-4 < -4
The last statement is false. A number cannot be smaller than itself.
Since the last inequality is false, it causes the first to be false for those x,y values. Therefore, we rule out choice A.
--------------
We'll do the same idea for the first inequality in choice B
x + y ≤ -4
3 + (-7) ≤ -4
-4 ≤ -4
This time we get a true statement at the end. The key difference is the "or equal to" portion.
Let's check the other inequality of choice B
3x + 2y < -5
3(3) + 2(-7) < -5
9 - 14 < -5
-5 < -5
We run into a similar issue as we did with choice A. We have no choice but to cross choice B off the list as well.
--------------
Choice C is eliminated for the same reason choice A was.
Choice D is the final answer because both inequalities involve "or equal to". So the -5 < -5 is now -5 ≤ -5 which is true.
It turns out that (3, -7) is on the boundary of each shaded region. It's at the intersection of the two boundary lines x+y = -4 and 3x+2y = -5.
D. x + y ≤ -4
3x + 2y ≤ -5
To see if (3, -7) satisfies both inequalities.
x + y ≤ -4:
Substitute x = 3 and y = -7 into the first inequality:
3 + (-7) ≤ -4
-4 ≤ -4
Since -4 is less than or equal to -4, the first inequality is true for the point (3, -7).
3x + 2y ≤ -5:
Substitute x = 3 and y = -7 into the second inequality:
3(3) + 2(-7) ≤ -5
9 - 14 ≤ -5
-5 ≤ -5
Since -5 is equal to -5, the second inequality is also true for the point (3, -7).
(✿◕‿◕✿)
Andre is solving the inequality 14x+3≤8x+3. He first solves a related equation. 14x+3=8x+3 14x=8x 8=14 This seems strange to Andre. He thinks he probably made a mistake. What was his mistake? Responses Andre made a mistake when he erased the 3 on both sides of the equation. Andre made a mistake when he erased the 3 on both sides of the equation. Andre made a mistake by changing the less than symbol to an equal sign. Andre made a mistake by changing the less than symbol to an equal sign. Andre made a mistake after getting 14x=8x. He divided each side by x, but this is not valid since x may be 0 and dividing by 0 gives an undefined result.
Andre made a mistake after getting 14x=8x. He divided each side by x, but this is not valid since x may be 0 and dividing by 0 gives an undefined result.
Andre should have collected the like terms in order to have all the variables x on one side before taking the difference.
Inequality expression
Given the inequality expression solved by andre expressed as:
14x + 3 ≤ 8x + 3
Simplify to have:
14x - 8x ≤ 3-3
6x ≤ 0
x ≤ 0
Hence andre should have collected the like terms in order to have all the variables x on one side before taking the difference.
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A spurious correlation is the implied causal relationships between events that are ________ linked.
A spurious correlation is the implied causal relationships between events that are statistically linked.
Spurious correlation;
A spurious correlation (or spuriousness) in statistics is an apparent causal relationship between two variables. Any reported dependencies between variables are solely the result of chance or are both a result of an unidentified confounder when there is misleading correlation.
When the price of higher education and the cost of living both rise, for instance, this doesn't necessarily indicate a causal link between the two factors because higher education tuition isn't always the result of rising living costs.
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Which choice is equivalent to the product below when x > 0?
LIX
81
OA.
-186
O B. BT
O c.
O D.
xlo
1/9 is Square root of expression .
What in mathematics is a square root?
The factor we can multiply by itself to obtain a given number is the number's square root. Square root is represented by the symbol sqrt, which stands for square root of, end square root. Squaring an integer is the reverse of finding its square root.A value known as the square root of a number is one that, when multiplied by itself, yields the original number. An alternative to squaring an integer is to find its square root.= √1/x² * √x²/81
= √x²/ x² * 81
= √1/81
= 1/9
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In year 2020, a pond had 798 gallons of water. In year 2024, the same pond had only 612 gallons of water. If the rate of change is constant, predict the volume of water in year 2030
If the rate of change is constant, the volume of the water in the pond by the year 2030 will be 147 gallons.
Define volume.
Any three-dimensional solid's volume is just the amount of space it takes up. It can be any shape like a cube, cuboid, cone, cylinder, etc. Various forms have various volumes. We have studied the several solids and forms that are specified in three dimensions, such as cubes, cuboids, cylinders, cones, etc., in 3D geometry. The SI unit of volume is cubic units.
Solution Explained:
Based on the conditions given in the question, we formulate as follows
(612 X (2024 - 2020) + (612 - 798) X (2030 - 2020) / (2024-2020)
= (612 X 4 - 186 X 10) / 4
= (2448 - 1860) / 4
= 588 / 4
= 147
Therefore, by 2030 the volume of the water in the pond will be 147 gallons.
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Put the following equation of a line into lope-intercept form,implifying all fraction 8x12y=108
The slope of the line from the equation is 2/3.
The line:
A line is a straight one-dimensional figure having no thickness and extending infinitely in both directions.
The formula of a line:
y = mx + c
m = slope
c = y-intercept
Here we are provided with the equation:
8x - 12y = 108
12y = 8x - 108
y = 2/3x - 9
So by equating we get the slope:
m = 2/3
Therefore the slope is 2/3.
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Mick gives roping lessons at the Sundown Corral. A 3-hour lesson costs $120.00. The cost of a lesson is proportional to the duration, in hours, of the lesson. What is the constant of proportionality in terms of dollars per hour?
A.40
B.45
C.50
D. 35
The constant of proportionality in terms of dollars per hour is A 40.
What is a constant of proportionality?The constant of proportionality is used to illustrate the constant relationship between the variables.
In this case, a 3 hour lesson costs $120.00 and the cost of a lesson is proportional to the duration, in hours, of the lesson.
The constant will be the division of the values. This will be:
= $120 / 3
= $40
The correct option is A
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A home loan including interest is 166430 to pay off the loan equal payments need to be made over the next 180 months about how much will each payment be per month
Answer:
The answer is 923.6111 because 166430÷180 is 923.6111
What is n 1.8n+0.2=3.2n+1
n = -0.5714
Step-by-step explanation:
[tex]{ \tt{1.8n + 0.2 = 3.2n + 1}}[/tex]
[tex]{ \tt{1.8n = 3.2n + 1 - 0.2}}[/tex]
[tex]{ \tt{1.8n = 3.2n + 0.8}}[/tex]
[tex]{ \tt{1.8n - 3.2n = 0.8}}[/tex]
[tex] { \tt{ - 1.4n = 0.8}}[/tex]
Divide both sides by -1.4 then,
[tex]{ \tt{ \frac{ - 1.4}{ - 1.4}n = - \frac{ 0.8}{1.4}}} [/tex]
Let us convert 0.8 to 8 and 1.4 to 14 by shifting the points. Then,
[tex]{ \tt{n = - \frac{8}{14}}} [/tex]
[tex]{ \tt{n = - \frac{4}{7}}} [/tex]
[tex]{ \blue{ \boxed{ \green{\sf{n = -0.571428571}}}}} [/tex]
5 =7/2 (3x + 2)
what is x?
Answer:
x=11
Step-by-step explanation:
ANSWER FOR BRAINLIST DUE TODAY!!
Answer:
c is correct.
Step-by-step explanation:
In c, the top equation stays the same.
Multiplying both sides of the bottom equation (3x - y = 4) by 2, we have
6x - 2y = 8.
what is 2 1/2 feet in inches form.
Answer:
30 inches
Step-by-step explanation:
1 ft=12 inches
We multiply this fraction by 12
2 1/2x12
5/2x12/1
60/2
30 inches
Hopes this helps please mark brainliest
2b plus 4a minus a minus 2 plus 12b
The value of the expression 2b plus 4a minus a minus 2 plus 12b is 3a + 14b - 2.
Expression:
An expression is defined as the a combination of operators, constants and variables. And it may consist of one or more operands, and zero or more operators to produce a value.
Given,
Here we have the statement "2b plus 4a minus a minus 2 plus 12b".
Now, we have to find the simplified form of this statement.
In order to find the simplified form,
First we have to convert the statement into expression form, then we get
2b plus 4a minus a minus 2 plus 12b = 2b + 4a - a - 2 + 12b
Now, we have to combine the like terms, then we get,
=> (2b + 12b) + (4a - a) - 2
Perform the appropriate arithmetic operations, then we get the simplified form of the expression as,
=> 14b + 3a - 2
Now, we have to arrange them in order then we get,
=> 3a + 14b - 2
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Find the Volume (pls help me)
Answer:
Step-by-step explanation:
32
Please help me with this, thank you.
Answer:
Step-by-step explanation:
Domain is the input
Range is the output
Function is the equation that is set up by the given information
1)
Domain 2 to 8
Range 1 to 6
Yes, this is a function
2)
Domain 2 to 3
Range 7 to 13
No, this is not a function , b/c functions need a 1 to 1 correspondence
3)
Domain 0 to 4
Range -1 to 5
No, this is not a function , b/c functions need a 1 to 1 correspondence
What is consumidores primarios?
Answer:Consumidores primarios: comen a los productores. Consumidores secundarios: comen a los primarios. Consumidores terciarios: comen a los carnívoros. Descomponedores: se alimentan de restos de seres vivos.
Step-by-step explanation:Consumidores primarios: comen a los productores. Consumidores secundarios: comen a los primarios. Consumidores terciarios: comen a los carnívoros. Descomponedores: se alimentan de restos de seres vivos.
Hello..!
¿What is consumidores primarios?
They are the ones that eat plants. They are herbivores or are parasites of these.
-4 2/3+2 1/2
in mixted number form
I keep getting the wrong answer
Answer:
Equation: 3x - 4 = 6 - 2x
Solution: x = 2
Step-by-step explanation:
Look at the key.
Left side of the equal sign:
A grey rectangle means x.
There are 3 grey rectangles on the left side, so that is 3x.
A white square means -1.
There are 4 white squares on the left side, so that means -4.
Altogether, the left side is 3x - 4.
Right side of the equal sign:
A black square means 1.
There are 6 black squares, so that means 6.
A white rectangle means -x.
There are 2 white rectangles, so that means -2x.
Altogether, the right side is 6 - 2x.
Put both sides together, and you have
3x - 4 = 6 - 2x
Solve the equation:
Add 2x to both sides.
5x - 4 = 6
Add 4 to both sides.
5x = 10
Divide both sides by 5.
x = 2
Answer:
Equation: 3x - 4 = 6 - 2x
Solution: x = 2
What is the slope of the line that passes through the points (-2, 2) and (-4, -1)
Answer:
f(x) = 1/2x + 3
Answer:
3/2
Step-by-step explanation:
(y2-y1)/(x2-x1)
(-1-2)/(-4+2)
-3/-2
the slope of the line is 3/2
Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and prepreview ads before the movie starts. Many complain that the time devoted to previews is too long. A preliminary sample conducted by the wall street journal showed that the standard deviation of the amount of time devoted to previews was 4 minutes. Use that as a planning value for the standard deviation in answering the following questions. Round your answer to next whole number. A. If we want to estimate the population mean time for previews at movie theaters with a margin of error of seconds, what sample size should be used? assume confidence. B. If we want to estimate the population mean time for previews at movie theaters with a margin of error of minute, what sample size should be used? assume confidence.
If we want to estimate the population mean time for previews at movie theaters with a margin of error of minute, then 56 sample size should be used and if we want to estimate the population mean time for previews at movie theaters with a margin of error of minute, then 22 sample size should be used.
In the given question,
A preliminary sample conducted by the wall street journal showed that the standard deviation of the amount of time devoted to previews was 4 minutes.
(a) We have to estimate the population mean time for previews at movie theaters with a margin of error of seconds, what sample size should be used.
Assuming the confidence interval 98% and margin error of 75 seconds.
We can write 98% as 0.98.
So the value of z at 98% confidence interval using the standard table of z is 2.326.
Standard Deviation= 4 minutes
Converting minutes in seconds so,
Standard Deviation= 4*60
Standard Deviation= 240
Margin of error is 75 seconds.
So the sample size = (Value of z * Standard Deviation)/Margin Error
Sample Size = ((2.326*240)/75)^2
Sample Size = (558.24/75)^2
Sample Size = (7.4432)^2
Sample Size = 55.401
Approx value of Sample Size = 56
Hence, if we want to estimate the population mean time for previews at movie theaters with a margin of error of 75 seconds, then 56 sample size should be used.
(b) We have to estimate if we want to estimate the population mean time for previews at movie theaters with a margin of error of minute, what sample size should be used.
The given margin of error is 75 seconds.
Now converting the error in minute by dividing 60.
Now the margin of error = 75/60=5/6 minute
Standard Deviation= 4 minutes
The confidence interval 98% and margin error of 75 seconds.
We can write 98% as 0.98.
So the sample size = (Value of z * Standard Deviation)/Margin Error
sample size = {(0.98*4)/(5/6)}^2
sample size = {6(0.98*4)/5}^2
sample size = (6*3.92/5)^2
sample size = (23.52/5)^2
sample size = (4.704)^2
sample size = 22.13
Approx value of Sample Size = 22
Hence, if we want to estimate the population mean time for previews at movie theaters with a margin of error of minute, then 22 sample size should be used.
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