ryanrblxx ryanrblxx
  • 21-03-2020
  • Mathematics
contestada

9x+y=28
3x+3y=(-12)
Solve using elimination

Respuesta :

miljanamilovanovic12
miljanamilovanovic12 miljanamilovanovic12
  • 21-03-2020

Answer:

(x, y)=(4,-8)

Step-by-step explanation:

9x+y=28

3x+3y=-12 /:(-3)

9x+y=28.......(1)

-x-y=4......(2)

9x+y=28

(1)+(2): 8x=32

9x+y=28

x=32/8

9x+y=28

x=4

9*4+y=28

x=4

36+y=28

x=4

y=28-36

x=4

y=-8

x=4

(x, y) =(4,-8)

Answer Link

Otras preguntas

twenty-one percent of people in a city eligible to donate blood actually do. You randomly select four eligible blood donors and ask them if they donate blood. C
distance between (-2,-4),(1,3)​
who was able to prove Ptolemy theory was wrong
Find the value of Y .
Find the area of the shaded region.
the length of a rectangle is twice its width. the perimeter of the rectangle is no more than 174cm. what is the greatest possible value for the width?
factor completely. x^2-3x-28
Adidea Corp. sold merchandise on credit. What accounts will the company use to document the transaction? A. Accounts receivable (debit); Allowance for bad debt
plz help with numbers 3 and 4 !!
1. Consider a cylinder with radius 4 cm and a height of 12 cm. Determine the volume of the given cylinder. Describe how to calculate the volume and explain what