Question

In which context will the inequality 4x + 5y > 80 have only integers in its solution set?

a. when x represents prices, in dollars, of adult tickets and y represents prices, in dollars, of student tickets
b. when x represents weights, in pounds, of apples and y represents weights, in pounds, of oranges
c. when x represents time, in hours, spent babysitting and y represents time, in hours, working at a bakery
d. when x represents the number of cats and y represents the number of dogs

Answer 1

The answer is D "when x represents the number of cats and y represents the number of dogs"

Explanation:

Cause I said so

Answer 2

I think the answer is D because all the other options have a decimal point e.g. $4.46, (I don't use pounds but I'm assuming it's something like 4 pound 46), 4 hours, 46 minutes. You simply cannot have 0.46 of a dog (unless you're very cruel.)

N.B. I only used 4.46 as an example, it's not the correct number.