Combine like terms to create a equivalent expression to
2r+1+(-4r)+7

-2r+8

Step-by-step explanation:

Add 1 and 7 to get    2r+8+(-4r)

Then subtract 4r from 2r because adding a negative is the same as subtracting. so that makes your answer      -2r+8  

10

step-by-step explanation:

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743