Answer:
The Answer to 17 1/3 x 8 is 138.67
There is not enough context to answer the second question.
In step one, you are supposed to add 25 to both sides, because if you just subtract, it would be -5x-50=53
Answer:

Step-by-step explanation:
Given : The formula for the area of a trapezoid with altitude k and bases m and n is 
We have solve for m .
Consider the given formula 
Multiply both side by
, we have,

Now subtract n both side, we have,

Thus, 
Answer:
Perimeter of a triangle = add all sides
Both the legs of the isosceles triangle are always EQUAL.
x+4x-6+4x-6 = 60
9x-12 = 60
9x = 60+12
9x = 72
x = 8