Answer:
4.R=16
D=16+16=32
C=

C=32π
then do the same thing for other problem
So it's 4x-5 equal to -20 to the second power
-20x-20 =400
The answer is 400
Answer:
5 and 6
Step-by-step explanation:
Answer:5
Step-by-step explanation:
27 chairs
5 tables
27/5
=5.4

Why?
We have the isosceles right triangle. The length of legs are 6. Use the Pythagorean theorem:

In general, the formula for calculating the hypotenuse in an isosceles right triangle is 
a - a leg, h - a hypotenuse