There are 10 fish in a tank. 2 drown, 4 swim away, and 3 die. how many are left?

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?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Aladder that is 20 ft. long against the side of a building. f the angle formed between the ladder and the ground is 75 degrees, how far is the bottom of the ladder from the base of the building?