Pls help me solve pls show how you got the answer

Me ! write an equation for the interior angles of this triangle that uses the triangle sum theorem

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

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2