Heygirl9632 Heygirl9632

04-05-2021
Mathematics

contestada

Which system of equations is equivalent to the system of equations shown? 2x + 5y = -2 4x + 7y = 8

Respuesta :

Yang100 Yang100

05-05-2021

Answer:

x=9, y=-4. (9, -4).

Step-by-step explanation:

2x+5y=-2

4x+7y=8

--------------

-2(2x+5y)=-2(-2)

4x+7y=8

---------------------

-4x-10y=4

4x+7y=8

--------------

-3y=12

y=12/-3

y=-4

2x+5(-4)=-2

2x-20=-2

2x=-2+20

2x=18

x=18/2

x=9

Answer Link

Otras preguntas

2 1/5 x 2 2/3 Help me someone

Who is depicted in the image above?

Can someone explain how it is possible for a single molecule of steroid hormone to create a significant and lasting response in an organisms cell?

You are considering a 5/1 ARM. What does the 1 represent? A. The total number of years of the loan B. The number of years that a fixed interest rate will be app

Why does your heart have to pump blood?

What is the horizontal distance between points A(-2.5, -1.5) and B(-0.5, -1.5)

6. When working at height do not assume that roofs are fragile unless you can confirm otherwise 7. Put in place emergency rescue arrangements. 8. Fit appropria

how can handle common injuries at childcare?

What were the positive effects of the growth of railroads? Check all that apply. Having more railroads made it easier for farmers and merchants to transport goo

Which number is not divisible by 3? 126 234 21 125