Kelko, boris, and hong have a total of $83 in their wallets. hong has 2 times what boris has. kelko has $7 more than boris. how much do each have?

Afurniture store has 1,500 chairs in storage. a manager uses three delivery receipts to simulate samples to check 100 chairs and note the number of brown chairs. suppose the actual number of brown chairs is 1,080. about how many brown chairs are

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.