rooksmichelle3 rooksmichelle3

13-02-2020
Mathematics

contestada

Solve each system of linear equations by elimination. 5x-y=7 4x+8y=-12

Respuesta :

ghanami ghanami

14-02-2020

Answer:

Step-by-step explanation:

hello :

5x-y=7....(*)

4x+8y=-12...(**)

multiply (*) by 8 : 40x-8y =56 ...(***)

add(**) and (***) : 44x = 44 so : x = 1

put this value in (*) : 5(1)-y = 7

y = 5-7 = -2

Answer Link

Otras preguntas

A student government has five positions to fill and there are nine candidates running for any one of the position. how many different possibilities are there fo

I need the answer to 5 and 6 asap

A Proposal to Girdle the Earth

Solve the inequality. 4p+7−p<31

Which label best fits the following text? Sir Isaac Newton, the first person who studied gravity seriously, discovered what is known as the law of universal gra

Petra wants to buy a skateboard. The skateboard deck usually costs $37.50, but it is on sale for 20% off. If the sales tax rate is 5.2%, how much will Petra pay

Describe Your level of understanding on calculaing the volume of a cylinder, cone and shpere.

help on both of them

What is the correct definition of gigante? A.glove B.big C.dwarf D.giant

Where are the bathrooms? in French with pronunciation