David is packing bundles of 3 inch by 5 inch cards, face up, into a square box. he places the cards side by side so that there is no wasted space. find the smallest measure for the edge of the box.

15 inches

Step-by-step explanation:

Since the box must be square, we find the Lowest common multiple of 3 and 5, which is 15

i think 1: 2

step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.