22 sandwiches and 2 sizes of baskets. One type holds 7 sandwiches and the other holds 4 sandwiches. If a=7 and b=4, which shows the way to carry the sandwiches?

Question

5b
2a + 2b
3a
1a + 3b

6/11/2014 | Tttttt from Orlando, FL | 2 Answers | 0 Votes

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Answer 1

If you did not have answers you could set up an equation and make a table of values.

7x+4y=22 where x and y are the two basket sizes.

x=1 means 7(1)+4y=22, 4y=15, no

x=2 means 7(2)+4y=22, 4y=8, y=2, yes

x=3 means 7(3)+4y=22, 4y=1, no

if a=7 and b=4 the answer is 2a+2b

6/11/2014 | Arthur D.

Answer 2

a = 7

b = 4

Plug in a=7 and b=4 into each expression and compute the answer:

5b = 5*4 = ??

2a + 2b = 2*7 + 2*4 = 14 + 8 = ??

3a = 3*7 = ??

1a + 3b = 1*7 + 3*4 = 7 + 12 = ??

Which expression adds up to 22 sandwiches?

6/11/2014 | Philip P.