A number is at most fifteen

x ≤ 15

Step-by-step explanation:

This is a problem about inequality.

These are the inequality symbols:

>            greater than

<            less than

≥            greater than or equal to

≤            less than or equal to

Choose a variable for the number

let "x" be the number

"x" is maximum 15. This means "x" can be 15, 142, 1, 0, -1 etc...

"x" cannot be 16, 17... any number greater than 15.

"x" is less than or equal to 15.

x ≤ 15

You might also see the answer like this:

15 ≥ x

It means the same thing because the "open" side is still facing "15". The "closed" side is still facing "x".

Although, the variable on the left side is standard formatting.

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.