Answer:
B
Step-by-step explanation:
Answer:
n=3
Step-by-step explanation:
-5 (6n +8) =50
First distribute the -5 to 6n and 8. Remember to multiply with the sign!
so -5 x 6n and -5 x 8
which = -30n and -40
so our new equation is
-30n - 40=50
we add 40 to the other side since we want the answer of the variable
-30n - 40 +40 = 50+40
-30n =90
we divide -30 from n to get n alone.
-30n/-30 = 90/-30
n=-3
We can check our answer by plugging it into the equation.
50= -5 (6(-3) +8)
50 = -5 (-18+8) -> 50= -5 (-10)=50
the perimeter of the square is 4cm