I think the answer is a I believe I don’t gave an explanation
Answer:
The equivalent expressions are:


Step-by-step explanation:
Given equation for finding area of a trapezoid:

where
represents area,
represents height and
represents the base lengths of the trapezoid.
Evaluating
by rearranging the equation to find an equivalent equation.
Multiplying both sides by 2.


Dividing both sides by



Evaluating
by rearranging the equation to find an equivalent equation.
Multiplying both sides by 2.


Dividing both sides by 


Subtracting both sides by 



The area of the semicircle is 14.1372
Answer: the area for the square is 126.56cm²:
1. distribute the 3 into the parentheses, so you would now have 6x+15=3x+4
2. combine like terms on the right side , so now you have 6x+15=7x
3. subtract the 6 from the left side so it cancels out and also subtract the 6 from the 7 so now you have 15=x
hope this answers your question !