Sorry if its twisted but i need help in # 3 please :)

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?