Fill in the empty spaces with monomials that make each equality into an identity.
(5x + ... )(5x − ...) = ... −0.49y^4

  (5x +0.7y^2)(5x -0.7y^2) = 25x^2 -0.49y^4

Step-by-step explanation:

We know the product of a sum and difference can be the difference of squares. The term on the far right is a perfect square: -(0.7y^2)^2.

The binomials on the left look like a sum and difference, so we can fill this in as ...

  (5x +0.7y^2)(5x -0.7y^2) = 25x^2 -0.49y^4

if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: