Answer: C. Substitute a value of x into the equation of a regression line and solve for y
Step-by-step explanation: To predict y values using equation of the regression line, a given value of x is substituted into the equation as there are only two unknowns in the whole regression equation, which are the x value ( independent variable) and the y value (the dependent or predicted variable).
The regression equation is usually of the form:
y = mx + c (linear regression)
Where y = predicted or dependent variable
m = slope or gradient of the regression line
x = independent variable
c = intercept of the line (where it cross the y-axis)
Patricias normal heart rate is 78 beats per minute. How many times does her heart beat in 3/4 of a minute?
Answer:
58.5
Step-by-step explanation:
1.) Divide 78 by 4
2.) Multiply 19.5 by 3
OR
1.) Change 78 to 78/1
2.) Multiply 78/1 by 3/4
3.) Smile because you got the answer right :)
Her heart beats 58.5 beats in 3/4 of a minute.
We have Patricia's normal heart rate.
We have to determine how many times does her heart beat in 3/4 of a minute.
What is the range of normal Heart rate of a human adult ?A normal resting heart rate for adults ranges from 60 to 100 beats per minute.
According to the question -
Patricia's normal heart rate = 78 beats per minute.
Now - 3/4 of a minute = 3/4 x 60 = 15 x 3 = 45 seconds.
Now -
60 seconds → 78 beats
1 second → (78/60) beats
45 seconds → (78/60) x 45 = 58.5 beats
Hence, her heart beats 58.5 beats in 3/4 of a minute.
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IM GIVING 50 POINTS!!! AND BRAINLIEST! NEED THE EQUATION NOT THE ANSWER A teacher has 15 weeks in which to teach six chapters. Write an equation that represents the number of lessons the teacher must teach per week if there is an average of 8.5 lessons per chapter. I NEED THE EQUATION NOT THE ANSWER
Answer:
6(8.5)/15
Step-by-step explanation:
Answer:
T = 6L/15 = 6(8.5)/15 = 51/15= 3.4 lessons per week
Seths reads 15% of the book in 30 minutes. How much more time will he need to finish reading the book?
The perimeter of the obtuse triangle to the right is 7.2 inches. Two of the three sides are labeled. What is the measurement of the third side?
Answer:
Measure of third side = 2.1 inches
Step-by-step explanation:
Perimeter of any polygon = Sum of lengths of all sides of the polygon
From the figure attached,
Number of sides of the polygon = 3
Therefore, perimeter of a triangle = sum of all three sides of the given triangle
Length of two sides = 1.7 inches and 3.4 inches.
Let the third side = x inches
Perimeter of the triangle = 7.2 inches
By the definition of the perimeter,
7.2 = 1.7 + 3.4 + x
7.2 = 5.1 + x
x = 7.2 - 5.1
x = 2.1 inches
Therefore, third side of the given triangle is 2.1 in.
What is the sum of -2 and V-18?
Answer:
V-20
Step-by-step explanation:
(-2) + (-18)= -20
help in this plssssssssssssss
Answer:
B. 1.23 g/cc answer is
Step-by-step explanation:
because in the picture the ice berg is cold and sea water
i doesn’t make sense
Answer:
i think it A i might be wrong
Step-by-step explanation:
The point (-4, 1) is in the top left or II quadrant.
-9x = 16.2 simplified?
Answer:
x = -1.8
Step-by-step explanation:
-9x = 16.2
Divide each side by -9
-9x/-9 = 16.2/-9
x = -1.8
9. Rachel earns $30 for every house she cleans. If she cleans 25
houses a week, what is her weekly pay? What is her annual pay?
plz help me.. 50 points if you answer all ill give brainliest
1) 1/4+1/2
We need to convert the fractions.
1/4 is fine.
1 x 2=2
2 x 2=4
1/4+2/4=3/4
2) a+a
a can be written as 1a.
1a+1a=2a
I can't see photos and he doesn't know 3 or 4 and i'm confused on 5.
a=?
Hope it helps?
Answer:
2. 2a
3. a^4
4. a^5
5. 1
9. 125
10. 1875
I believe most of these are correct
identify the constants in the following
really need help I don't know how to do this can someone explain it to me please??
the sum of x and -15 is 23
Answer: x=38
Step-by-step explanation:
x+(-15)=23
x-15=23
+15 +15
x=38
When there is a positive and negative sign the negative sign cancels the positive sign.
Answer:
38
Step-by-step explanation:
23+15=38 because in order to get 23 from -15 a negative number you need to have 38 to silence the -15.
Evaluate 1 + b for b = 13.
Answer:
[tex]14[/tex]
Step-by-step explanation:
[tex]1+b[/tex]
We know that [tex]b=13[/tex] so we put that into our equation.
[tex]1+13[/tex]
Add:
[tex]14[/tex]
Answer:
[tex] \boxed{ \bold{ \huge{ \boxed { \sf{ 14}}}}}[/tex]
Step-by-step explanation:
Given, b = 13
plug the value of b . Thenafter, add the numbers
[tex] \sf{1 + b }[/tex]
[tex] \dashrightarrow{ \sf{1 + 13}}[/tex]
[tex] \dashrightarrow{ \sf{14}}[/tex]
Hope I helped!
Best regards! :D
Four less than three times a number increased by six times the same number is 32
what’s the answer?
-11
-4
—4
-7
Answer:
Step-by-step explanation:
Let the unknown number be x;
for Four less than three times a number, it is expressed as (3x-4)
If the number gotten is increased by six times the same number, the equation becomes 3x-4+6x
If they are all equal to 32 then;
3x-4+6x = 32
We are to look for the value of x from the expression;
3x-4+6x = 32
-4+9x = 32
add 4 to both sides
-4+9x+4 = 32+4
+9x = 36
x = 36/9
x = 4
Hence the answer to the unknown number is 4
Kevin is having a party and he needs to buy the ingredients to make guacamole. At the first supermarket, he bought 6 limes and 2 avocados for a total of $7.50. Later the same day, he bought 2 more limes and 1 more avocado for a total of $3.00. What was the price of each type of fruit? Let x represent _____________________________ Let y represent _____________________________ System: _____________________
Solution: x = ____________ y = ____________
Answer:
Let x represent: the price per lime.
Let y represent: the price per avocado.
System: 6*x + 2*y = $7.50
2*x + y =$3.00
Solution: x = $0.75 y = $1.50
Step-by-step explanation:
Here we have two variables, x and y.
Let's take x = price per lime, and y = price per avocado.
We know that when he bought 6 limes and 2 avocados he paid $7.50, so we can write this as:
6*x + 2*y = $7.50
And we also know that when he bought 2 limes and 1 avocado, he paid $3.00
2*x + 1*y = $3.00
Then we have a system of equations:
6*x + 2*y = $7.50
2*x + y =$3.00
Now we want to solve this system,
The first step is isolating one of the variables in one of the equations, let's isolate y in the second equation:
y = $3.00 - 2*x
Now we can replace this into the other equation:
6*x + 2*($3.00 - 2*x) = $7.50
6*x + $6.00 - 4*x = $7.50
$6.00 + 2*x = $7.50
2*x = $7.50 - $6.00 = $1.50
x = $1.50/2 = $0.75
now we can find the value of y.
y = $3.00 - 2*x = $3.00 - 2*$0.75 = $1.50
Help!!! I just need Help on number 6 please!!!!!!!! ASAP!!!
Answer:
[tex]3[/tex]
Step-by-step explanation:
[tex]\sqrt{12} =3.46[/tex] (2 decimal places)
If you want to arrange the tiles into a square, you will need 3.46 in each row/column.
This is physically impossible, hence you round it down to 3.
(If you round it up, you won't have enough tiles since [tex]4*4=16[/tex])
Thus, the square area will be [tex]3*3=9[/tex]
Tiles left: [tex]12-9=3[/tex]
10% increase of $29,350?
Answer:
$2,935 increase, which makes $32,285.
Step-by-step explanation:
10% is .10, so just multiply 29,350 by .10 and ger 2,935. Then add it to your inital value.
Simplify each expression
6(a+8)
Can you please help me
Answer:
6a+48
Step-by-step explanation:
Distribute:
6(a+8)
6 x a = 6a
6 x 8 = 48
6a+48
Answer: 6a + 48
Step-by-step explanation: use the distributive property and multiply 6•a to get 6a and multiply 6•8 to get 48
Sammy has 90,000 and laila has 1,000,000 laila gived sammy half of the money who has the greatest number? explain
Answer:
Sammy has the greatest amount.
Step-by-step explanation:
I figured that out because half of 1,000,000 is 500,000 , and Laila had 1,000,000 but gave Sammy half of that money , and Sammy had already started out with 90,000 , So 500,000 + 90,000 = 590,000 . So that means Laila is stuck with the 500,000 while Sammy has the 90,000 she started off with and the 500,000 Laila gave her .
Jaime’s refrigerator loan statement said that he would pay $1,026 as interest after 4 years at an interest rate of 13.5%. How much did Jaime borrow to buy the refrigerator?
Answer:
$1900
Step-by-step explanation:
Starting from the equation of simple interest, which is defined as follows:
I = P * r * t
Being I the interest, P the value of the product, r the interest rate and t would be time.
We want to know the price of the product, therefore, solving the equation we have:
P = I / r * t
We know each other's values so we replace:
P = 1026 / (0.135 * 4)
P = $ 1900 was the value of the refrigerator Jaime bought
Answer:
$1900
Step-by-step explanation:
Starting from the equation of simple interest, which is defined as follows:
I = P * r * t
Since I is the interest, P the value product, r the interest rate and t would be time
We want to know the price of the product, therefore, solving the equation we have:
P = I / r * t
We know each other's values so we replace:
P = 1026 / (0.135 * 4)
P = $1900 was the value of the refrigerator Jaime bought.
what is the domain of f(x)=3x-4
Answer:
There are no domains so 0
Step-by-step explanation:
The domain of any function is simply all the possible numbers you can input for x
without violating the rules of math.
we cannot have a negative number for x (its against the laws of math), so the domain would be all non-negative numbers
:) Hoped this helped
Is a bicycle an asset or a liability?
Answer: I think the answer is that the bicycle is a liability.
What is 30/95 in simplest form
Answer:
30/95
Step-by-step explanation:
because 95 cant be split
Hey there!
[tex]Answer:\boxed{\frac{6}{19}}[/tex]
[tex]Explanation:[/tex]
[tex]\frac{30}{95}[/tex] in simplest form
95 / 30 = 3.16666666667 Divide
3.16666666667 = 19/6 Convert to a fraction
6/19 Flip up the fraction
6/19 is the final answer.
Hope this helps!
A researcher plans to study the causal effect of police on crime, using data from a random sample of U.S. counties. He plans to regress the county’s crime rate on the (per capita) size of the county’s police force. (a) Explain why this regression is likely to suffer from omitted variable bias. Which variables would you add to the regression to control for important omitted variables
Answer and Step-by-step explanation:
This regression can generate an omitted variable bias, because the researcher did not determine any parameters or real data to measure it. In this case, the researcher determined the crime rate as a dependent variable, but did not establish the facts that influence it and that promote an observable result. In this way, he omitted the independent variable and his research will be inaccurate and incorrect. To control this bias, it is necessary for the researcher to provide a dependent variable such as the level of education in the region, the income distribution in the region, the unemployment rate, the fraction of young men, among others.
Consider a student loan of $17,500 at a fixed APR of 6% for 15 years.
a) calculate the monthly payment
b) determine the total amount paid over over the term of the loan.
c) of the total amount paid, what percentage is paid toward the principal and what percentage is paid for the interest.
Answer:
A. $147.67
B. $26,581.49
C. Principal: 65.8352%
C. Interest: 34.1647%
The values:
a) PMT = $147.67.
b) $26580.6
c) Of the total amount paid, 65.84 percentage is paid toward the principal and 34.16 percentage is paid for the interest.
What is a loan calculation formula?The formula:
PV = PMT/i[1 - {1/(1+i)ⁿ]
PV denotes the loan sum.
PMT stands for "monthly payment," I for "interest rate" (interest rate % divided by 12), and "n" for the number of months (term of the loan in months)
Given:
Consider a student loan of $17,500 at a fixed APR of 6% for 15 years.
PV is the loan amount = 17500
PMT is the monthly payment .
i is the interest rate per month in decimal form (interest rate percentage divided by 12)
i = 0.06/12 = 0.005
n is the number of months (term of the loan in months)
n = 180 months.
The monthly payment,
PMT = PV i(1+i)ⁿ/{(1+i)ⁿ-1}
PMT = 17500(0.005)(1.005)⁴⁸/{(1.005)⁴⁸-1}
PMT = $147.67.
The total amount paid over the term of the loan,
= 147.67 x 180 = $26580.6
Of the total amount paid, 65.84 percentage is paid toward the principal and 34.16 percentage is paid for the interest.
Therefore, all the required values are given above.
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A poll of 1068 adult Americans reveals that 48% of the voters surveyed prefer the Democratic candidate for the presidency. At a 0.05 level of significance, test the claim that atleast half of all voters prefer the Democrat.
Answer:
Z = -1.333
P-value = 0.09176
Decision Rule: Reject [tex]H_o[/tex] if ∝ is greater than the P-value
Conclusion: Since P-value is > the level of significance ∝, we fail to reject the null hypothesis, therefore there is insufficient evidence to conclude that at least half of all voters prefer the Democrat.
Step-by-step explanation:
Given that:
The sample size of the poll = 1068
The proportion of voters that preferred Democratic candidate is [tex]\hat p[/tex] = 0.48
To test the claim that at least half of all voters prefer the Democrat, i.e 1/2 = 0.5
The null hypothesis and the alternative hypothesis can be computed as:
[tex]H_o : p \geq 0.50[/tex]
[tex]H_1 : p < 0.50[/tex]
Using the Z test statistics which can be expressed by the formula:
[tex]Z = \dfrac{\hat p - p}{\dfrac{\sqrt{p(1-p) }}{n}}}[/tex]
[tex]Z = \dfrac{0.48 - 0.5}{\dfrac{\sqrt{0.5(1-0.5) }}{1068}}}[/tex]
[tex]Z = \dfrac{-0.02}{\sqrt{\dfrac{{0.5(0.5) }}{1068}}}[/tex]
[tex]Z = \dfrac{-0.02}{\sqrt{\dfrac{{0.25}}{1068}}}[/tex]
[tex]Z = \dfrac{-0.02}{0.015}[/tex]
Z = -1.333
P-value = P(Z< -1.33)
From z tables,
P-value = 0.09176
The level of significance ∝ = 0.05
Decision Rule: Reject [tex]H_o[/tex] if ∝ is greater than the P-value
Conclusion: Since P-value is > the level of significance ∝, we fail to reject the null hypothesis, therefore there is insufficient evidence to conclude that at least half of all voters prefer the Democrat.
Evaluate the following integral. e^x+3/e^x g
Answer:
[tex]x -3e^{-x} + C[/tex]
Step-by-step explanation:
Given the integral [tex]\int\limits {\dfrac{e^{x}+3}{e^x} } \, dx[/tex], we are to evaluate it. Note that sum of integral is equal to the integral of its individual sum as shown;
[tex]\int\limits {\dfrac{e^{x}+3}{e^x} } \, dx = \int\limits {\dfrac{e^{x}}{e^x} } \, dx + \int\limits {\dfrac{3}{e^x} } \, dx[/tex]
[tex]= \int\limits 1\, dx + 3\int\limits {e^{-x} \, dx \\\\[/tex]
[tex]= x + 3(-e^{-x})\\\\= x -3e^{-x} + C[/tex]
Hence the value of the evaluated integral is [tex]x -3e^{-x} + C[/tex] where C is the constant of integration.
Please explain the solution for this problem.
Answer:
1st add 2x+25 then 3x+1 then 5x-2 what answer you get thats the answer of this question......
pleae follow me and give me a thanks also mark me brai liest. i will mark u too.....
Simplify each expression below as much as possible. 6x + 2 - 1 - 4x - 3 - 2x + 2
Evaluate the expression when m= 2. m2 - 8m -3
Answer:
-15
Step-by-step explanation:
When
m=2Expression get value of:
m² - 8n - 3 = 2² - 8*2 - 3 =4 - 16 - 3 =-15Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{ - 15 }}}}}[/tex]
Step-by-step explanation:
Given, m = 2
[tex] \sf{ {m}^{2} - 8m - 3}[/tex]
plug the value of m
[tex] \longrightarrow{ \sf{ {2}^{2} - 8 \times 2 - 3}}[/tex]
Evaluate the power : 2²
[tex] \longrightarrow{ \sf{4 - 8 \times 2 - 3}}[/tex]
Multiply the numbers: 8 and 2
[tex] \longrightarrow{ \sf{4 - 16 - 3}}[/tex]
The positive and negative integers are always subtracted but posses the sign of the bigger integer :
[tex] \longrightarrow{ \sf{ - 12 - 3}}[/tex]
The negative integers are always added but posses the negative ( - ) sign
[tex] \longrightarrow{ \sf{ - 15}}[/tex]
Hope I helped!
Best regards! :D
