A store sells a box of highlighters that contain 4 yellow, 3 blue, 2 pink and 1 green highlighter. What is the probability of randomly picking first a blue and then 1 pink highlighter?

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

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?

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42