Divide the following polynomials, then place the answer in the proper location on the grid. write the answer in descending powers of a. divide 5a^2 + 6a - 9 into 25a^4 + 19a^2 - a - 78.

Step-by-step explanation:

(25a^4           +  19a^2  -    a  -  78) : (5a^2 + 6a - 9)  =  5a^2 - 6a + 20   Rest  -175x + 102  

25a^4  + 30a^3  -  45a^2                

———————————————————————————————————————

       - 30a^3  +  64a^2  -    a  -  78

       - 30a^3  -  36a^2  +  54a        

       ————————————————————————————————

                  100a^2  -  55a  -  78

                  100a^2  + 120a  - 180

                  —————————————————————

                          - 175a  + 102

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168