The price of an item has risen to $279 today yesterday it was $180 find the percentage increase

What values of c and d make the equation true?

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?