Eight more than four times a number is -12

Solve the system of equations y= 3/2 - 1, -x+ y =-3

The area of square garden is 300m squared. how long is the diagonal?

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate. in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30