Simplify each expression without using a calculator. For each expression, draw a diagram or use words to explain how you know your answer makes sense. -8 / -4

2

Step-by-step explanation:

A negative divided by a negative equals a positive, so -8 ÷ -4 = 2

e

step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.