Julia spent $58 on a book. the cost of the book was $20 less than twice what she spent on a backpack. how much did the backpack cost?

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

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

What is the product? a-3/15a × 5/a-3