HELP PLEASE 17. A triangle has sides of length x, X -3 And x+6 what is the perimeter of the triangle?
A.3x+3
B.3x^3+3
C.3x^3+18
D.3x+9

A. 3x+3

Step-by-step explanation:

The perimeter is found by adding all the side lengths:

(x)+(x-3)+(x+6)

=1x+1x+1x-3+6

=3x+3

(Remember, add x-terms to x-terms, and numbers to numbers)

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!

answer: finding the extract measurements and knowing the points

step-by-step explanation: