What is the answer to x2-64

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

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