There are 5 red marbles and 12 silver marbles in a bag. you randomly choose one of the marbles. what is the probability of choosing a red marble? write your answer as a fraction in simplest form.

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

Which equation shows the quadratic formula used correctly to solve 5x2 + 3x -4 0 for x? cos -3+ v (3) 2-4() 2(5) 3+ |(3)² +4() 205) 3+ (3) 2-4() -3+ v (3)² +4()