10 books because the ratio is 2:5 and you have 4:x so x=10 ((:
Answer:
90+30=120
180-120=60 this is degree measure
If you crumble paper it is hard to uncrumble like trust
You need to multiply the four numbers and then takeway
Answer:
That is has root -12 meaning if you replace x with -12 you get 0.
