Clarence solved the equation 3x + 15 = 33 and showed the following work. did he do the work correctly?

3x + 15 = 33
3x + 15 - 15 = 33
3x = 33
=
x = 11

which of the following is true?
x is 11.
x should be 6.
x should be 16.
x should be 99.

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)

363 square inches

step-by-step explanation:

surface area of a pyramid is b + 1/2ph

b is the area of the base: 11 x 11 = 121

p is the perimeter of the base: 11 + 11 + 11 + 11 = 44

h is the height of the pyramid: 11

121 + 1/2(44)(11)

121 + 242

363