Answer:
To factor something out you've got to divide, so you would take 5x+40 and divide it all by 5
So, 5x/5= 1x
And, 40/5= 8
Your answer is now x+8 when factored
Answer:

Step-by-step explanation:

Answer:
it's -11
Step-by-step explanation:
hope this helped
Perimeter of rectangle:2(length+width):2(13+7)=40
Perimeter of square:4(length of one side):4(x)=40
X=10
X(a+b)-y(a+b)
*factor out (a+b)*
=(a+b)(x-y)