The value of y varies directly with the value of x. When y = 24, x = 4. What is the value of x when y = 48?

I'm terrible at math any here is appreciated.

The probability that a college student belongs to a health club is 0.3. the probability that a college student lives off-campus is 0.4. the probability that a college student belongs to a health club and lives off-campus is 0.12. find the probability that a college student belongs to a health club or lives off-campus. tip: p(a or b) = p(a) + p(b) - p(a and b) 0.54 0.58 0.70 0.82

It says factor each expression completely 8y+48