Transformations of Functions - Algebra 2

i don’t understand this :(

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

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Combine like terms to make a simpler expression 3z+z