Which situation could represent a proportional relationship? *

A. The librarian received 30 new books in a 2-week time period and she already had 150 books.
B. The employee gets paid $38 for 4 hours and a bonus of $300.
C. The customer bought 6 coffees for $36.
D. The customer paid for 1 pizza for $9.99 and $2.75 for the delivery.

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)

i belive those are the ones that are under 90 degreese.

10 down (bang1)

5 up

5down (2)

2.5 up

2.5 down (3)

1.25 up

1.25 down (4)

now add them up : )

hoped i lol

first one because it can't have a fraction in it

step-by-step explanation: