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3 years ago

I need help. !!! Please explain this to me

Mathematics

1 answer:

Airida [17]3 years ago

5 0

It seems appropriate to use the linear regression function of your calculator for this. Looking at the data, you know the slope is generally positive, so only the 1st and 3rd choices are potentially viable.

A calculator shows the correlation coefficient (r) rounds to 0.816, so the appropriate selection is ...
A. 0.816

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Enter the equation of the circle described below. Center (3, -2), radius = 5

coldgirl [10]

The equation of a circle is (x-h)^2+(y-k)^2=r^2, where (h,k) is the center and r is the radius. Our equation will be (x-3)^2+(y+2)^2=25 (remember to always square the radius).

:)

6 0

3 years ago

Read 2 more answers

Evaluate the expression without using the calculator 8^1/3

allsm [11]

Answer:

= $2.67$

Step-by-step explanation:

Given: $8^1/3$

We have to find the value of the given fraction which can be done by dividing the denominator value with the numerator value

$\frac{8^1}{3} \\$

The power of 8 is '1', so, the value of numerator is 8.

$\frac{8}{3}$

The value of the fraction is calculated by dividing 3 by 8.

= $2.67$

8 0

3 years ago

Use substitution to solve the following system of equations. - 4y - 5x = 30 AND x= y + 3

IRISSAK [1]

Answer:

The solution to the system of equations is y = -5 and x = -2.

Step-by-step explanation:

The question tells us to use substitution to solve the system. This means that the given value for x (in terms of y) should be substituted into the other equation. This is modeled below:

-4y - 5x = 30

-4y - 5(y+3) = 30

Next, we should use the distributive property to simplify the left side of the equation.

-4y -5y - 15 = 30

The next step is to combine like terms on the left side of the equation.

-9y - 15 = 30

Then, we can add 15 to both sides of the equation.

-9y = 45

Finally, we can divide both sides of the equation by -9.

y = -5

To find the value for x, we substitute in the value we just found for y into either of our original equations.

x = y + 3

x = -5 + 3

x = -2

Therefore, the correct answer is y = -5 and x = -2.

Hope this helps!

3 0

3 years ago

Felicity put down 800 on a used car. She took out a loan to pay off the balance of the cost of the car. Her monthly payment will

jenyasd209 [6]

She would have paid 1,575 dollars plus the 800 down payment. The total would be $2,375.

8 0

3 years ago

A spinner used in a board game is divided into 12 equally sized sectors. Seven of these sectors indicate that the player should

forsale [732]

Answer:

9.3 inches

Step-by-step explanation:

The computation of the radius of the spinner be given below:

Let us assume the same be x

We know that

Total area of the sector = one-sixth of the total area of the spinner

Given that

45.1 = 1 ÷ 6 × π × r^2

r^2 = 45.1 × 6 ÷ π

r^2 = 86.1

r = 9.279

= 9.3 inches

3 0

3 years ago