I'm pretty sure the answer is A because you're multiplying each number by 105 and A is the only answer with 105
We know the perimeter is the total sum of all sides of the shape, we can use this to form an equation: the perimeter=1st side + 2nd side + 3rd side + 4th side 39a-7=9a+(5a+1)+(17a-6)+4th side.
Collect like terms to get 39a-7=31a-5+4th side
If we move everything but the 4th side over to the left we can solve
C. 8a-2=4th side is the correct answer
Answer:
Step-by-step explanation:
To solve, first subtract 2x from both sides.
You appear to want the solution for -y, so I've included it. Given that you also want the solution for y, divide both sides by -1.
5 is the highest common factor
