Simplify.
(7t² - 6t-4) + (5t² - 3t+2)

12t² - 9t - 2

Step-by-step explanation:

Combine like terms. Like terms have same variable with same exponents.

(7t² - 6t-4) + (5t² - 3t+2) = 7t² - 6t-4 + 5t² - 3t+2

                                      = 7t² + 5t²   - 6t - 3t  - 4 + 2

                                       =  12t² - 9t - 2

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076