Use substitution to solve each system of equations

y=3x-7

3x-y=7

Which digits can replace the_ to make a true statement? 6,456<6,_12<6,788

Mason had 30 dollars to spend on 3 gifts. He spent 8 3 4 dollars on gift A and 6 1 2 dollars on gift B. How much money did he have left for gift C?

52642 rounded to the nearest thousand

Angle 5 and 6 are supplements and angle 5 is 24 more than half the measure of angle 6. find the measure of each angle.

How many gallons do you have if you have 18 quarts

What does a computer do when it's hungry

Brandie is trying to decide between two cell phones. One is free with a 2-year contract, but she will have to pay the sales tax of 8% on the original price$399 and the monthly charge is $10 more than she currently pays.

If the length of side a is 16 centimeters, the length of side b is 10 centimeters, and m = 42°, what is the measure of? Round your answer to two decimal places.

Solve for y. 18y - 6 = - 30

Multiply. (3x + 2) (3x - 2) A. x² + 12x - 4 B. 9x² - 12x - 4 c. 9x - 4 D. 9x² + 4