I have homework and i dont understand it its called "Solving Systems of Equations by Elimination." The problem im stuck on is

8x+y=-16

-3x+y=-5

I need the answer and how to do it.

Use the cubic model y = 5a3 - 2a2 + a - 45 to find the value of y when x = 4.

Choose exactly two answers that are correct. 1. (1 pt) Which number sentences could be used to solve this problem? Sharon has 32 friends. She would like to give each friend 12 grapes.

75 Which expression is equivalent to 72? (7.5) (7.2) (7-7-7-7-7) (7.7) 7.5 7.2 7.7.7.7.7 7.7

50,000 is blank times as much as 500?! I don't get it!

Write and solve a proportion to answer the question. What number a is 0.4% of 40?

Rewrite the following in the form log (c). log (10) - log (5)

A race at travels at a rate of 205 mph how far would it travel in 3 hours?

10 qt equal to how many cups

24x^6y^3 / - 6x^3y is equivalent to

What is 2 thirds divided by one half?