Find the quotient of 4/7 and 3/5
Give your answer as a fraction in its simplest form.

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

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.

Use the given information to determine the exact trigonometric value.