How to multiply decimals?

3.9 ÷ 38.22

What is the y-coordinate of the solution of the system of equations? [tex]y = 2x + 14 \\ - 4x - y = 4[/tex]y=

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Agrasshopper weighs 0.89 grams. express the grasshopper’s weight in scientific notation.