6a - 2b + 7a - 4b + 2​

13a + -2b + 2

Step-by-step explanation:

Add the numbers with the variable of A up, 6a+7a=13a

Add the numbers with the variable of B up, 2b-4b=-2b

Then there is only the number 2 left,

And other variables with different numbers cannot add up

Thus it is ended with 13a+-2b+2

2.

according to newton’s cannonball model, what happens if the cannonball's velocity is enough to overpower the pull of earth’s gravitystep-by-step explanation:

answer: there are x+184 pages in olivia's book.

step-by-step explanation:

let the total number of pages in the book which olive has already read be x.

then if olive has 184 pages left to read, then the total number of pages are in olive's book= pages she has read+pages she has left to read

therefore, the total number of pages in olivia's book=

hence, there are x+184 pages in olivia's book.