Answer:

Step-by-step explanation:
Amount of chopped onions required = 
Amount of onions Katrina has already chopped = 
Amount of onions that are required to be chopped is given by

Hence, the amount of onions that are required to be chopped is
.
Answer:
8, 12, 16
Step-by-step explanation:
You just take the number of minutes multiply by 4 km
50 x 18 not that hard actually :) 900
You could buy 276 single markers, you can buy 28 packs of markers, or 3 boxes of marker because 1pack = 10 markers, 10 markers multiplied by 10 packs equals 100. So 1 box would have 100 markers in it and if you took 2 boxes you would be missing 76 markers, so you're better off getting 3 boxes and having 300 markers than being less by 76.