Answer:
Step-by-step explanation:
I assume you need help with the first picture:
Let 
Then
Clearly you can see that the sum of 2 rational numbers gives a rational number.
9514 1404 393
Answer:
shaded/square = (50π cm²)/(400 cm²) = π/8
Step-by-step explanation:
The quarter circle has area ...
A = (1/4)(πr²) = π/4(20 cm)² = 100π cm²
The half-circle has area ...
A = (1/2)(πr²) = π/2(10 cm)² = 50π cm²
Then the area of the shaded portion is ...
shaded = 100π cm² -50π cm² = 50π cm²
__
The area of the square is ...
A = s² = (20 cm)² = 400 cm²
Then the ratio of interest is ...
shaded/square = (50π cm²)/(400 cm²) = π/8
Answer: Mary had six pieces of candy but her mother didn’t want her having too much sugar. She took away half of her candy. How many pieces does she have now?
Step-by-step explanation:
<span><span>18<span>x5</span></span><span>y2</span></span><span><span>2x</span>−<span>3<span>y</span></span></span>
=<span><span><span>18x5</span>y2</span><span>2x−<span>3y</span></span></span>
Answer:
23
Step-by-step explanation:
With f(4), we plug 4 into the function.
f(4) = 4² + 7
f(4) = 16 + 7
f(4) = 23
