If I babysit my little sister, my mom has to work.
Shape: Rectangle
Area: (Length) x (Width)
Perimeter: 2(Length) + 2(Width)
(SHOWED WORK IN PICTURE)
Answer:
38
Step-by-step explanation:
Since 19 is 50% of x, we multiply it by two
19 x 2 = 38
It would be half of the coefficient of x squared added to both sides:
So half of 8 ( the coefficient of 8x) is 4;
The number 4 squared is 16, so you would add that to both sides.
You do this so that you can easily factor the left side: x^2 + 8x + 16 = 4 + 16
(x + 4)(x+4) = 20