Helppp me plleeeaaasseee

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4

Olivia is using 160 quilt squares to make a red, yellow, and blue quilt if 25% of the quilt are red and 30% are yellow how many quilt squares are blue