A hospital gift shop sells magazines, books and cards in the ratio 4:3:9. Suppose the shop sold 45 books, how many magazines and how many cards did they sell.

Books is the 3 in the ratio, so for every 3 books sold there are 4 magazines and 9 cards.

Divide the number of books by 3:

45/3 = 15

Multiply the ratio of magazines and cards by 15:

Magazines = 15 x 4 = 60

Cards = 15 x 9 = 135

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)