What is the derivative of f(x)=e^-8x?

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

X+y=-4 x-y=2 use elimination with adding and subtraction

If you invest 1,500 today in a bank that gives you a 5 percent annual interest rate, which of these items can you buy in two years? a. electronics worth $1,650 b. fitness equipment worth $1,700 c. a holiday package worth $2,000