Which equation shows the substitution method being used to solve the system of linear equations?

x – y = 7

x = y + 3

a.

(y + 3) – y = 7

b.

x – (y + 3) = 7

c.

x – y = y + 3

d.

x = (7 – x) + 3

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?