Joianie beleives that you cannot use cross products to solve the proportion 50/3 = 75/x for x. She says

4.5 It doesn't come out evenly, but cross products do work.

Step-by-step explanation:

She is not correct.

50 * x = 3 * 75              Combine the right

50x = 225                    Divide by 50

x = 225/50

x = 4.5

i think the answer is b.

step-by-step explanation:

not 100% sure though.

days of the week

step-by-step explanation:

javier earned more money then kyle, so that won't always be a constant term, but the days of the week do not change so that term is always constant.

edit: i meant