The coordinates of Z are (21). What are the new coordinates of Z' after a dilation with a scale factor of 2?
(4,2) (2,2) (2,4) (8,4) (1. 0.5)

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

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

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?