Answer fast pls

Ten times the square of a non-zero number is eqaul to ninety times the number

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?