The denominator must be the same, so just think of the LEAST COMMON MULTIPLE, The LCM here is 8, because you can multiply 4 by 2 to get 8.
so when you multiply, you multiply both on the top and on the bottom, so this would be:
3 x 2 / 4 x 2 = 6 / 8
Now you can add or subtract: 6/8 - 1/8 = 5/8

7 0

3 years ago

A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 140 lb and each bo

Stells [14]

Answer:

21 boxes of books

Step-by-step explanation:

guy= 140 lbs

each box= 40lbs elevator can only weigh up to 1010

i took 1010- 140 and got 870lbs left for the books

then i took 870 divided by 40 (to see how many boxes of books can be put on the elevator) and got 21.75

so 21 boxes could go on the elevator at a time