How much of a 30% solution do you need to add to 280 ml of water to obtain a 4% solution? Need to set up 2 equations with two variables each to find x and y
The hints given are:
x=the amount of ml's needed to be added to the 280 mls and
y= the amount of the 30% solution that is contained in the amount added to the 280 mls

a = 11 : 4

b = 38

c = 1 for every 6

a.) list the factors of 40.

1/2/4/5/8/10/20/40

b.) list the factors of 40 that represent the number of cans that could be on each shelf.

5

c.) how many different arrangements of cans are possible?

just one because if you put more on one shelf you will go way over 40 and the cabinet will probably break.

d.) what are the possible arrangements of the cans?

put 5 cans on each self to reach 40 cans in total.

e.) which arrangement uses all the shelves?

5 because you can put 5 cans on each shelf, and since there are 8 shelfs you are equally going to get 40 cans.