Answer:

Step-by-step explanation:
step 1
Find the value of y
we know that
In the right triangle of the figure

Remember that

so

Simplify

step 2
Find the value of x
In the right triangle of the figure

Remember that

so


Answer:
m = 8 + 3n
Step-by-step explanation: there is an app called photo math it solves these problems instantly. I used it for this problem.
Answer:
40x-11
Step-by-step explanation:
Area = lw
So 7(4) =28
Area = 28
The answer is C.