giasienna14 giasienna14

02-02-2021
Mathematics

contestada

this is solving systems of equations by elimination, though I am a bit confused

this is solving systems of equations by elimination though I am a bit confused class=

Respuesta :

thebecks thebecks

02-02-2021

Answer:

x=7

y=-1

Step-by-step explanation:

4x+8y=20

-4x+2y=-30

8y=20-4x

y=(20-4x)/8

substitute

-4x+2(20-4x)/8=-30

-4x+(40-8x)/8=-30

-4x+5-x=-30

-5x=-35

x=7

4(7)+8y=20

8y=-8

y=-1

Answer Link

Otras preguntas

Function: y = x^2+ 5x - 7 Vertex:( Solutions:( and

It’s not A it’s wrong dose anyone know the answer

On the map below, the star is marking which of the following places? A. Gaza Strip B. Jerusalem C. Golan Heights D. West Bank

Ben works as a medical assistant. He needs to take a patient's vitals, but the patient is refusing to cooperate. He hasn't experienced this before, so he decide

what are the fundamental units involved in pascal

"If a nation is rich in resources then it can be developed! Justify this statement.

Which of the following correctly describes the formula for speed?

how does quartz watch give time?

why do the aquatic plants not break down by water current?

A shopper was riding on an up escalator in a department store when the escalator stopped abruptly. The shopper lost her balance and fell down the escalator step