Answer: A and C
d + q = 5 is one correct answer, not 500
0.1d + 0.25q = 5 as this is literally just the equation you are doing.
If the domain of a one-to-one function f is [6,&), the range of its inverse, f-1 , is
If the domain of a one-to-one function f is [6,&), the range of its inverse, f-1 of the one to one function is [6, &)
What is one to one function?In mathematics, functions are said to be one-to-one functions, when one input value only give an output. No two input values give same output value in a one to one function
Usually in mathematics, functions may have two inputs which give same outputs however for one to one functions one input value gives only one output value
Relating this to domain (input values) and range (output values) and inverse.
The domain of a one to one function will be the range of inverse of the one to one function
This is among the property of one to one function
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I need help with this!!!!!
3^4x + 2 = 9^x +2
I need help please
In a test of a sex-selection technique, results consisted of female babies and male babies.
1. Based on this result, what is the probability of a female being born to a couple using this technique?
2. Does it appear that the technique is effective in increasing the likelihood that a baby will be a female?
The probability of a female being born to a couple using this technique is 0.923.
Yes, it is effective in increasing the likelihood that a baby will be a female.
Given:
In a test of a sex-selection technique, results consisted of 215 female babies and 18 male babies.
Total = 215+18
= 233
1.
The probability of a female being born to a couple using this technique is:
p = 215/233
p = 0.923.
hence the probability of the female being born to a couple is 0.923.
2.
Yes it is effective in increasing the likelihood that a baby will be a female because the probability of female is higher than the probability of male to be born.
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Which situation is best modeled by an exponential function with time as the
independent variable?
A. an investment that takes 2 years to increase in value by $50 and
10 years to increase in value by $250
B. an investment that increases by a constant factor of 1.03, or at a
rate of 3%, every year
OC. an investment that increases by $30 every year
D. an investment that increases by $1 every 2 weeks
An investment that takes 2 years to increase in value by $50 and
10 years to increase in value by $250 situation is best modeled by an exponential function with time as the independent variable
What is Equation?Two or more expressions with an Equal sign is called as Equation.
We need to find the exponential function with time as the independent variable.
Exponential growth refers to the original value from the range increases by the same percentage over equal increments found in the domain.
an investment that takes 2 years to increase in value by $50 and
10 years to increase in value by $250
an investment that increases by a constant factor of 1.03, or at a
rate of 3%, every year
an investment that increases by $30 every year
an investment that increases by $1 every 2 weeks
Hence, an investment that takes 2 years to increase in value by $50 and
10 years to increase in value by $250 situation is best modeled by an exponential function with time as the independent variable
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Lydia buy 5 pounds of apples and 3 pounds of bananas for a total of $8.50. Ari buys 3 pounds of apples and 2 pounds of bananas for a total of $5.25. This system of equations represents the situation, where x is the cost per pound of apples, and y is the cost per pound of bananas.
1. If you multiply the first equation by 2, the number to multiply the second equation by eliminating the y terms when making a linear combination is -3.
2a) The price per pound of apples is $1.25.
b) The price per pound of bananas is $0.75.
What is a system of equations?A system of equations involves two or more equations solved together.
Such equations are also known as simultaneous equations.
5x + 3y = 8.5 ... Equation 1
3x + 2y = 5.25 ... Equation 2
Multiply Equation 1 by 2:
5x + 3y = 8.5 ... (x 2)
= 10x + 6x = 17 ... Equation 3
Multiply Equation 2 by -3:
3x + 2y = 5.25 ... (x -3)
-9x -6y = -15.75 ... Equation 4
Add Equations 3 and 4:
10x + 6x = 17
+
-9x -6y = -15.75
= x = 1.25
Substitute x = 1.25 in Equation 1:
5x + 3y = 8.5
6.25 + 3y = 8.5
3y = 2.25
y = 0.75
Check variables in Equation 2:
3x + 2y = 5.25
= 3(1.25) + 2(0.75) = 5.25
= 3.75 + 1.5 = 5.25
5.25 = 5.25
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Question Completion:5x + 3y = 8.5
3x + 2y = 5.25
1. If you multiply the first equation by 2, what number should you multiply the second equation by in order to eliminate the y terms when making a linear combination?
2. Complete the multiplication and add the equations. What is the result?
What is the price per pound of apples? $
What is the price per pound of bananas?
Based on the data shown below, calculate the regression line (each value to two decimal places). Your answer should be in the form
ˆ
y
=
b
0
+
b
1
x
.
ˆ
y
=
+
x
r =
x y
5 25.6
6 26.52
7 28.14
8 30.56
9 32.18
10 35.1
11 37.32
12 39.74
13 40.96
14 44.58
15 46.2
The regression line, considering the points given in this problem, is defined as follows:
y = 2.16x + 13.61.
How to obtain the linear regression equation?The linear regression equation is obtained inserting the points of the data, that can be given in a table or a in a scatter plot, into a linear regression calculator.
These points are composed by a value of x and a value of y, and these values are listed as follows:
Values of x: 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.Values of y: 25.6, 26.52, 28.14, 30.56, 32.18, 35.1, 37.32, 39.74, 40.96, 44.58, 46.2.Inserting these points into the linear regression calculator, the equation is given as follows:
y = 2.16x + 13.61.
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"I'm thinking of a number. If you multiply
it by 8 and then add 17, you will get 33.
What is my number?"
Equation:
Answer:
HALP PLEASE EMERGENCY
Answer:
a.) The relation is linear
b.) Plot the given (x,y) coordinates on the given graph and connect them.
c.) The y-intercept is at y=2.
d.) m=4
e.) y=4x+2
Step-by-step explanation:
a.) The relation is linear because the values in the sequence of first differences are all equal:
6-2=4 10-6=4 14-10=4 18-14=4
c.) The y-intercept is the point on the graph where x=0. According to the given points, the y-intercept must be y=2.
d.)
[tex]m=\frac{y_2-y_1}{x_2-x_1}\\(x_1,y_1)=(0,2)\\(x_2,y_2)=(4,18)\\m=\frac{18-2}{4-0}\\m=4[/tex]
e.) Plug slope (m) and y-intercept into the slope-intercept form to get y=4x+2.
A stack of books is 52 inches tall.
Each book is 1/2 inch thick. Which expression tells us how many books are in the stack?
Answer:
52 / (1/2)
Step-by-step explanation:
Divide the total height by the thickness of each book.
52 / (1/2)
Write each set in the indicated form.
If you need to use "..." to indicate a pattern, make sure to list at least four elements of the set
a. Roster form: { 3, 4,5, 6}
b. Set-builder form : {x | x is an integer, where x ≥ -5}
What is a Roster form?
A list of the elements of a set, each separated by a comma, enclosed in a group of curly brackets, can be used to describe the contents of the set. Roster form is the term for this method of describing a collection.
What is a set-builder form?
Set builder notation is defining a set by expressing its properties rather than simply listing its constituents. One or more variables and a rule specifying which elements are part of the set and which are not are included in the set builder notation.
Here,
a. It is given the set is A={x:x is an integer 3 ≤ x ≤ 6}.
Then the integers lying between 3 and 6 are 3,4,5,6.
So the roster form is
A={3,4,5,6}.
b. It is given that A = { -5, -4, -3, -2......}
then the set-builder form is
A = {x | x is an integer, where x≤ -5}
Hence,
a. Roster form: { 3, 4,5, 6}
b. Set-builder form : {x | x is an integer, where x ≥ -5}
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The number of laps Amelie swam daily for the past 3 weeks is shown in the dot plot. A number line going from 2 to 10. 3 dots are above 2. 2 dots are above 3. 3 dots are above 4. 5 dots are above 5. 4 dots are above 6. 2 dots are above 7. 1 dot is above 10. Use the dot plot to complete the statements. The dot plot shows that Amelie swam 3 laps times. Amelie most frequently swam laps. The data distribution is .
Regarding the data-set, we have that:
The dot plot shows that Amelie swam 3 laps two times.Amelie most frequently swam 5 laps.The data distribution is left skewed.What is shown by the dot plot?The dot plot shows the absolute frequencies of each observation, hence we have that:
Amelie swam two laps three times.Amelie swam three laps two times.Amelie swam four laps three times.Amelie swam five laps five times. -> most frequent due to the highest number of dots.Amelie swam six laps four times.Amelie swam seven laps two times.Amelie swam ten laps one time.The distribution is analyzed considering the mean and the median.
The mean is given by the sum of all observations divided by the number of observations, hence:
Mean = (2 x 3 + 3 x 2 + 4 x 3 + 5 x 5 + 6 x 4 + 7 x 2 + 10 x 1)/(3 + 2 + 3 + 5 + 4 + 2 + 1) = 4.85.
There are 20 observations, hence the median is composed by the mean of the 10th and of the 11 observation, which are both of five, hence the median is of five.
Since the median is greater than the median, the data distribution is left skewed.
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Answer:
5, skewed right
What number can you add to √7 to get a rational number?
√7
-√7
0
7
Answer: -√7 because it will cancel out to equal 0
-2x - 4y = 10
-3x-2y=-1
Answer:
3/5 elimination
Step-by-step explanation:
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The temperature T, in degrees Fahrenheit, t hours after 6 AM is given by:
T(t)= -1/2t^2+8t+32
0≤1≤ 12
What is the warmest temperature of the day? When does this happen?
The warmest temperature or "maximum" temperature means we need to find the derivative of the function.
T = -(t^2)/2 + 8t + 32
dT/dt = -t +8
A maximum/minimum occurs when the derivate(gradient) = 0
Therefore, dT/dt = 0
0 = -t + 8
t = 8
Putting t = 8 back into the original equation gives.
T(8) = 64 degF
So the warmest temperature is 64 degF 8 hours after 6am so at 2pm
Mary borrowed $720 from her parents. She will make equal payments of $60 per month for 12 months to repay the loan. Which equation can Mary use to find out how much money she still owes after each loan payment?
Answer:
$0
Step-by-step explanation:
Answer:
She will owe 2,391
Step-by-step explanation:
760-60x12
An equivalent expression for 4(3a+7)+3(2a+5). If a=5 are the answers the same?
(18a + 43) is an equivalent expression for the given expression i.e.
4(3a + 7) + 3(2a + 5).
Yes, the answers are same from both the expressions i.e. 133.
Given, an expression i.e. 4(3a + 7) + 3(2a + 5)
Now, we are asked to find an equivalent expression for the given expression.
So, on simplifying the given expression, we get
4(3a + 7) + 3(2a + 5)
12a + 28 + 6a + 15
12a + 6a + 28 + 15
18a + 43
So, (18a + 43) is an equivalent expression for the given expression i.e.
4(3a + 7) + 3(2a + 5)
Now, On putting the value of a = 5 in both the expressions, we get
4(3(5) + 7) + 3(2(5) + 5)
= 4(15 + 7) + 3(10 + 5)
= 4(22) + 3(15)
= 88 + 45
= 133
also in (18a + 43),
= 18(5) + 43
= 90 + 43
= 133.
Hence, (18a + 43) is an equivalent expression for the given expression i.e.
4(3a + 7) + 3(2a + 5).
Yes, the answers are same from both the expressions i.e. 133.
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"I'm thinking of a number. If you multiply it
by 5 and then take away 7, you will got 53.
What is my number?"
Equation:
Answer:
Answer: 12
Equation: 12 times 5 - 7.
Step-by-step explanation: 12 times 5 is 60 and take away 7 would be 53.
Hoped This Helped!
The shallow end of a swimming pool is 3.75 feet below the pool's surface. The
deep end of the pool is 5.75 feet deeper. Write and evaluate a subtraction
expression to find the depth of the deep end of the swimming pool.
The depth of the deep end of the swimming pool is 9.50 feet.
What is an expression?Expression simply refers to the mathematical statements which have at least two terms which are related by an operator and contain either numbers, variables, or both.
Since the shallow end of a swimming pool is 3.75 feet below the pool's surface and the deep end of the pool is 5.75 feet deeper, the depth will be:
= -3.75 - 5.75
= - 9.50
It is 9.50 feet deep.
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The hypotenuse of a right triangle measures 10 cm and one of its legs measures 8 cm.
Find the measure of the other leg. If necessary, round to the nearest tenth.
[tex]\textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies \sqrt{c^2 - a^2}=b \qquad \begin{cases} c=\stackrel{hypotenuse}{10}\\ a=\stackrel{adjacent}{8}\\ b=opposite\\ \end{cases} \\\\\\ \sqrt{10^2-8^2}=b\implies \sqrt{36}=b\implies 6=b[/tex]
PLEASE HELPPP
One of your friends missed the class on scientific notation. Describe how you would explain to your friend what it means for a number to be in scientific notation and how to convert a number from standard form to scientific notation.
Using the concept of scientific notation we can write 5.14*10^5 to convert from 5.14*10^5.
What is scientific notation?
Using scientific notation, one can express extremely big or extremely small values.
When a number between 1 and 10 is multiplied by a power of 10, the result is represented in scientific notation.
For instance, 650,000,000 can be represented as 6.5 108 in scientific notation.
The scientific notation consists of a coefficient multiplied by 10 and raised to an exponent.
To convert to a real number, start with the base and multiply by 5 tens like this: 5.14 × 10 × 10 × 10 × 10 × 10 = 514000(there are only 4 zeros because you cancel one zero to remove the decimal) so we write 5.14*10^5 to convert from 5.14*10^5.
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please help me with these question i know that some are answered but there not.
Answer:
1. A
2. A, B, D
Step-by-step explanation:
The first one is pretty straightforward, divide 7^2 to both the denominator and numerator, so you get 1/7^2. 7^2 is 49, which is not 14, so A is false. Everything else produces 1/49 in some shape or form.
The second question is also relatively easy. A is correct because 1/4 is 4^-1 and (4^-1)^-1 is 4^1. B is also right because if you add all the exponents up, you basically get -5+6+1=2, and 2^2 is 4. C is wrong because (1/2)^2 is 1/4, not 4. D is correct because 2^(5-3) is 2^2, which is 4. E is wrong because 4^(4-2) is 4^2, which is 16, not 4.
Overall, it's not hard, nor does it take time, you just need to remember the basic formulas: [tex]\frac{1}{x^a} =x^{-a[/tex], [tex]x^a * x^b=x^{a+b[/tex], and [tex]\frac{x^a}{x^b} = x^{a-b[/tex]
a baker's dozen (13) of cookies is on sale for $4.94. how much does each cookie cost
Answer:
0.41
Step-by-step explanation:
$4.94/12=0.41
Answer: $0.39.
Step-by-step explanation: $4.94. Divided by 13 = $0.38
12. The Height of the CN Tower is about 550 m. What is the height of the CN Tower in a scale drawing if the scale is 1:11 000?
The height of the CN Tower on scale drawing is 0.05.
What is scale?A scale is a group of levels or numbers that are applied to a certain system of measurement or comparison.
Given that,
The height of CN Tower = 550 m,
Also, the scale is 1/11000
Let the height of the CN Tower in the scale is x,
Then,
x/550 = 1/11000
⇒x= =550/11000
⇒x = 0.05
The height of the CN Tower on scale drawing is 0.05.
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As Mars revolves around the sun, it travels at a speed of approximately 15 miles per second. Convert this speed to kilometers per second. At this speed, how
many kilometers will Mars travel in 20 seconds? In your computations, assume that I mile is equal to 1.6 kilometers. Do not round your answers.
Mars travels at a rate of 24 km per second.
At this rate, Mars travel 480 km in 20 seconds.
What is speed?
The speed of an item, which is a scalar quantity in everyday usage and kinematics, is the size of the change in that object's position over time or the size of the change in that object's position per unit of time.
Here, we have
Mars revolves around the sun, it travels at a rate of approximately 15 miles per second.
1 mile = 1.6 km (given)
15 miles = 15 ×1.6 = 24 km
So, Mars travels at a rate of 24 km per second.
In 20 seconds, Mars will travel 24×20 =480km
Hence, Mars travels at a rate of 24 km per second.
At this rate, Mars travel 480 km in 20 seconds.
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Find x.
Please help me with this
Answer: a.
Step-by-step explanation:
Without computing, which best describes the value of (1/4) / 274?
(A) About one
(B) Much greater than one
(C) Much less than one
(D) There is not enough information
Answer:
Step-by-step explanation:
1/4 is already less than 1.
When you divide 1/4 by 274, you get much less than 1.
Much less than 1
¿Cuál es el número resultante de sumarle 3 al triple de
su mitad es igual a 33?
Answer:
15
Step-by-step explanation:
1. 2x + 3 = 33
2. 2x = 33 - 3
3. 2x = 30
4. x = 15
Write the equation in standard form using integers.
y+3=3/4(x+5)
The equation in standard form is _____
Answer:
-3x + 4y = 3
Step-by-step explanation:
Ax + By = C standard form
y + 3 = 3/4 (x + 5) | ×4
4(y + 3) = 3(x + 5)
4y + 4·3 = 3x + 3·5
4y + 12 = 3x + 15
-3x + 4y = 15 - 12
The equation in standard form is -3x + 4y = 3
Brandon made a model of a tower as shown below. It is composed of a square, prism, and a square pyramid. The height of the pyramid is 2 inches while The height of the prism 3 feet and the base of the prism is 8 inches long. What is the volume, to the nearest cubic inch, of the tower?
The volume, to the nearest cubic inch, of the tower is 2,347.
Brandon made a model of a tower, as shown in the figure. The tower is composed of a square prism and a square pyramid. The height of the pyramid is 2 inches. The height of the prism is 3 feet = 36 inches and the base of the prism is 8 inches long. Let the volumes of the tower, prism, and pyramid be represented by the variables V, V1, and V2.
V1 = L*B*H
V1 = 8*8*36
V1 = 2,304
The volume of the square prism is 2,304 cubic inches.
V2 = (1/3)a²h
V2 = (1/3)(8)²(2)
V2 = 42.67
The volume of the square pyramid is 42.67 cubic inches.
The volume of the tower is the sum of the volumes of the square prism and the square pyramid.
V = V1 + V2
V = 2,304 + 42.67
V = 2,346.67
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If <1 and <2 are complementary, what are the measures of the backed when
The measures of the angles are m∠1 = 69° and m∠2 = 29°
How to find the measures of an angle?
*Triangles always have angles that add up to 180 degrees. As a result, you may find the unknown angles by taking the specified angles of a triangle and subtracting them from 180.
*Finding Unknown Measurements Using Exterior Angles
Two angles that together total 180 degrees are known as supplementary angles. These two angles combine to form a straight angle when put side by side
m∠1 = (4x-7)°
m∠2 = (x+12)°
As the two angles are complementary
4x-7+x+12=90°
5x+5=90°
5x=90-5
5x=85
x=[tex]\frac{85}{5}[/tex]
x=17
Therefore
m∠1 = 4(17)-7
m∠1 = 61°
m∠2 = 17+12
m∠2= 29°
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