What is 2(x + 8) = x + 21

x=5

Step-by-step explanation:

2(x + 8) = x + 21

Distribute

2x+16 = x+21

Subtract x from each side

2x-x +16 = x-x+21

x +16 = 21

Subtract 16 from each side

x+16-16 =21-16

x =5

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: