HELP ME GIVING OUT BRAINLIEST

2a+7+4ahow many terms? how many variables? any like terms? yes noif yes, which ones? what are the coefficients? any constants? yes noif yes, which ones? simplify the expression by combining like terms and constants: how many terms now?

How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

Solve for n? [tex]z = \frac{3}{4} mn[/tex]