Y=-1/3(x-12)^2+9
find the focus, directrix, vertex, and axis of symmetry.

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

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?