Find the value of X and Y

After being rearranged and simplified, which of the following equations could be solved using the quadratic formula? check all that apply. a. 9% + 3x2 = 14 + x-1 b. -x+ + 4x + 7 = -32-9 c. 5x + 4 = 3x4 - 2 d. 2x2 + x2 + x = 30

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

Indicate the formula for the following conditions: p^c(n, r)=