5. The ratio of boys to girls in Ms. Lewis' class is 6 to 7. If there are 42 girls, how many boys are there?

There would be 6 boys.

Step-by-step explanation:

Hope this helps:)

36 boys

Step-by-step explanation:

The question says that for every 7 girls there are 6 boys in the class. Using this line of reasoning we can say this:

For every 14 girls, there are 12 boys

For every 21 girls, there are 18 boys

For every 28 girls, there are 24 boys

For every 35 girls, there are 30 boys.

For every 42 girls, there are 36 boys.

You can see the pattern here, and there are 36 boys in that class.

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.