White expression can be used to represent the length of DF to prove that ABC is similar to DEF

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

Given: and prove: what is the missing reason in the proof? given transitive property alternate interior angles theorem converse alternate interior angles theorem

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?