lilrude383
lilrude383 lilrude383
  • 12-04-2022
  • Mathematics
contestada

HURRY 50 points solve the system using linear combination. show all work.{ 9x + 4y = 28 {2x + 4y = 0

Respuesta :

fieryanswererft
fieryanswererft fieryanswererft
  • 12-04-2022

Answer:

y = -2

x = 4

Explanation:

  • 9x + 4y = 28
  • 2x + 4y = 0

Make "x" subject in equation 2

  • 2x + 4y = 0
  • 2x = -4y
  • x = -2y

Insert this in equation 1

  • 9(-2y) + 4y = 28
  • -18y + 4y = 28
  • -14y = 28
  • y = -2

Find for x

  • x = -2y
  • x = -2(-2)
  • x = 4
Answer Link

Otras preguntas

9/10 divided by (1/10 plus 2/5)
It takes Akira 10 minutes to make a black and white drawing and 25 minutes for a color drawing.  On Saturday he made a total of 9 drawings in 2 hours.  Write an
What does y-intercept represent?
find the area of a circle with a diameter of 22 inches?
9/10 divided by (1/10 plus 2/5)
Taylor wants to make 2 1/2 times the quantity given in a recipe. The recipe calls for 1 3/4 cups of flour. How much flour will Taylor need?
find the area of a circle with a diameter of 22 inches?
what do you call two ratios that have the same value
There are 50 questions to answer in a trivia contest. Each player starts with 100 points. He or she earns 10 points for each correct answer but loses 4 points w
what is x3+3x2-x-3 factor by grouping