Seudónimo Seudónimo

18-12-2020
Mathematics

contestada

14. What is the solution of the system?
5x - y= -7
3x - y= -2
-2.5, -5.5
-2.5, 11
5, 2.5
2.5, 5.5

Respuesta :

18-12-2020

Answer: -2.5, -5.5

Step-by-step explanation:

5x - y= -7

3x - y= -2 multiply by -1

5x - y= -7

-3x + y= +2 we add both equations

2x=-7+2, 2x=-5, x=5/2= -2.5

5(-2.5)-y=-7

- 12.5-y= -7 we simplify and get

-y=-7+12.5, -y=5.5, y=-5.5

Answer Link

Otras preguntas

In order to manage, protect, and control territory locally, a country often __________. a. divides into administrative units b. establishes an enclave c. establ

1/5 and 10/50 equivalent

one major result of the completion of the erie canal was that

The Internet is not a good place to connect with people when looking for a job. A).True B).False

What jobs did Washington hold during both the Revolution and the New Nation

The main idea always comes at the end of the paragraph. a. True b. False

Bulimia is a healthy way to control your weight. True or False

What is the measure of angle CED? There are two triangles labeled ABC and DCE with a common vertex C. In triangle ABC, angle BAC is labeled as m, and angle ABC

Jacob has m nails and twice as many bolts as nails. He buys another 20 nails and 30 bolts. Find the total number of nails and bolts joacob had now.

The leader of the Mensheviks was _____. Lenin Trotsky Martov Nicholas