Y=4x and y+x=5?

a, [-4, 1]
b, [1,4]
c, [-3,2]
d, [2,3]

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

What are the first 4 terms in the multiplication pattern given by the formula 2×4n

Abook store is having a 30 perscent off sale. diary of the wimpy kid books are now 6.30 dollars each what was the original price of the books