3x-2y=4

how do you do this using common core ?

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

Asap! i'm not good math and i'm lost.

Rewrite 9 log, x2 in a form that does not use exponents. 9log, x = log, x