Answer:
π
Step-by-step explanation:
Formula for the circumference of a circle
2r(π)
Area of a circle
πr²
2r(π)=x
x/2(π)=r
π(x/2(π))²=Area
π(x²/4(π)²)=Area
(x²/4(π))=Area
(15π)²÷4π=Area
π
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Answer:
7) B, C
8) D
Step-by-Step-Explanation:
The first thing you need to solve for is the the parenthesis
the second one simplifies to x ≤ -7
Answer:

Step-by-step explanation:
Plot the figure to better understand the problem
see the attached figure
we know that
If the figure is a rectangle
then

The area of the rectangle is equal to

where
B is the base
h is the height
the base B is equal to the distance AB
the height h is equal to the distance AD
Step 1
Find the distance AB
the formula to calculate the distance between two points is equal to


substitute the values

Step 2
Find the distance AD
the formula to calculate the distance between two points is equal to


substitute the values

Step 3
Find the area of the rectangle

we have

substitute

Answer:
Bob has one more marble than Kayla.
Step-by-step explanation:
The complete question in the attached figure
Let
x -----> the number of marbles Bob has
y ----> the number of marbles Kayla has
we have

we know that
To find out how many more marbles Bob has than Kayla, subtract the number of marbles Kayla has from the number of marbles Bob has

Substitute the given values

therefore
Bob has one more marble than Kayla.