50 points, need help ASAP Solve this system of equations, then determine what y equals.
x + 5y= 7
2x + 4y = -4

y=-18
y=3
y=8
y=-8

What number is 7 units left of -15?

If the diagram polygon abcd is a reflection across ef to make polygon a'b'c'd'.

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year? show your work and explain your reasoning in the space provided below.