A recipe for sparkling grape juice calls for 1 1/2 quarts of sparkling water and 3/4 quart of grape juice. How much of each ingredient would you need to make 100 quarts of punch ?

Sum is 17 and their difference is 3

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!