Answer:
Step-by-step explanation:
Hello, please consider the following.
We have two equations:
(1) -2x - 4y = 20
(2) -3x + 5y = -25
5*(1)+4*(2) gives
-10x - 20y -12x + 20y = 100 - 100 = 0
-22x = 0
x = 0
I replace in (1)
-4y = 20
y = -20/4 = -5
There is one solution x = 0, y = -5
Hope this helps.
Do not hesitate if you need further explanation.
Thank you
Answer:
the correct answer is a
Step-by-step explanation:
45 + 30 = 15(3 + 2) = 15(5) = 75
Answer:
C
Step-by-step explanation:
3y-2x<=6
3(-4) - 2(2)<=6
-12-4<=6
-16<=6