Answer:

Step-by-step explanation:
4x - 6y = 8 ⇔ - 6y = -4x + 8 ⇔ y = 4/6x - 8/6 ⇔ y = 2/3x - 4/3
7*y - 5*(4-2y) = 7y - 20 +10y = 17y-20 = 31,
y =3, x = -2.
Weird 20 min without answer!
Answer:

Step-by-step explanation:
Let's see if we can think of two numbers that multiply to be 3(-5)=-15
andd add up to be -2
How about -5 and 3? That work's! :)

Factor by grouping!

D (the last option)
x 2 -2 4 -4
y 8 8 12 12
because the x values should not repeat for the y values.
3250 / 625 = 5.2
It will take 5.2 hours for the plane to travel 3250 miles.