In your notebook, set up the following subtraction in a vertical format and select the correct answer. reduce 7y + 2y 2 - 7 by 3 - 4y.

In general reducing A by B means we subtract B from A.

Question says Reduce 7y + 2y^2 -7 by 3-4y

It means we subtract 3 - 4y from 7y + 2y^2 -7

We use vertical format for subtracting

First we arrange the terms

7y + 2y^2 -7 can be written as 2y^2 + 7y -7

3 - 4y can be written as 0y^2-4y +3

Now arrange one by one in vertical format and subtract. While subtracting we change the sign of bottom expression so 0y^2 -4y + 3 becomes -0y^2 + 4y -3

2y^2 + 7y -7

-0y^2+4y -3

2y^2 + 11y -10

answer: f true

step-by-step explanation:

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: