If you could get the answer with a short explanation that would be great!

3x + 1

Step-by-step explanation:

                       3x + 1          

x - 5     I 3x² - 14x - 5                   3x²÷x = 3x; (x-5)*3x = 3x² - 15x

              3x² - 15x                          Subtract

             -       +      

               0  +  x   - 5                       x ÷x = 1 ;  (x -5)*1 = x - 5

                       x   - 5                      Subtract

                     -     +    

                          0    

$3,200 x 7.25% = $3,200 x .0725 = $232 interest monthly

$232 monthly x 12 annual = $2, 784

step-by-step explanation:

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)