Select the correct answer.

which sum or difference is modeled by the algebra tiles?

a. (-x2 + 2x + 3) − (x2 − 2x − 1) = -2x2 + 2

b. (-x2 + 2x + 3) − (-x2 + 2x + 1) = -2x2 + 2

c. (-x2 + 2x + 3) + (-x2 + 2x + 1) = -2x2 + 2

d. (-x2 + 2x + 3) + (-x2 − 2x − 1) = -2x2 + 2

Someone answer asap for ! michele pushes a box d meters across a floor. she uses a force f, in newtons, to push the box. she pushes the box for t seconds. the formula p = fd/t calculates the power, p, in watts, that it takes for michele to complete the task. solve the formula for d.