Answer:

Step-by-step explanation:
we have


we know that

substitute the variable x in the function g(x) by the function f(x)
so

Evaluate 
For x=0


For #16, it can be assume that the two angles are linear, so set them both equal to 90 (9x+x-10=90) and solve for x. Once you have x, plug it into the equations to find the measure of both angles. If both your final answers are added, they should equal 180. If not, go back and try to find where you messed up.
Your answer is a Square Pyramid.
(Hope I helped :C
For a cuboid's volume you simply go length x width x heigth so 2x4x5 so it's 40.
X+10=18. |-10 from both sides
x+10-10=18-10
x=8