For problems 1-4, solve the given system of equations using either substitution or elimination. 1.
2x + y = -8
y = 2x + 4

A. (-4, 0)
B. (-3, -2)
C. (1, 6)
D. infinitely many solutions

2.
10x + 3y = -11
8x + 2y = -6

A. (-2, 3)
B. (-1, 1)
C. (1, -7)
D. No solution.

3.
-3x + 2y = 2
3x + 4y = 13

A. (1, 2.5)
B. (2, 4)
C. No solution
D. Infinitely many solutions

4.
4x - y = -3
-8x + 2y = 6

A. (0, 3)
B. (-2, -5)
C. No solution
D. Infinitely many solutions

I've been trying to figure out these answers for an hour and I still don't understand it :( If anyone could please help out, it would really be appreciated <3​

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !

it would rotate about 180 degrees.

he earned 78.75 in interest.

step-by-step explanation: