12a - 7 + 4a + 8

what is the answer

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total

How many terms does the polynomial x^2 y^2 have

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?