Solve this equation for d. d- 6 = 6

A. d = 0

B. d = 6

C. d = 12

D. d = 36​

Can someone answer this question? : )

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.