Perform the following operations and prove closure.
(x/x+3) + (x+2/x+5)
(x+4/x^2+5x+6) * (x+3/x^2-16)
(2/x^2-9) - (3x/x^2-5x+6)
(x+4/x2−5x+6) / (x2−16/x+3)
Please write your answer in the form of (answer) if x does not equal to

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

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

Which region represents the solution to the given system of inequalities? |-0.5x+y23 | 1.5x+ys-1 5 4 -3 -2 -1 1 2 3 4