V - the center of a circle;
r = 10
In the triangle VWS :
WS = x
VS = 10 ( hypotenuse )
VW = 10 - 4 = 6
We will use the Pythagorean theorem:
x² + 6² = 10²
x² + 36 = 100
x² = 100 - 36
x² = 64
x = √ 64 = 8
Answer:
C ) 8
A=2πrh+2πr2=2·π·6·25+2·π·6^2 so the answer is D
B.) 8(x+4) is the best choice
Answer:
x=30
Step-by-step explanation:
You have to isolate for x. This means you need to somehow get x on one side of the equation all alone. In this case it is x-9=21 which means some unknown number x with 9 subtracted from it is equal to 21. When we bring the -9 over to the other side to get the x all alone, we have to switch the sign of the -9 so it becomes +9. This means x=21+9, and if you add that you'll get 30!
Let's do the bracket part first,
and solve further as shown,
