Witte a two column proof

Given

Tim is 5 years older than Melissa. The sum of their ages is 21. This system is represented by the equations: t = 5 + m t + m = 21 What is the solution if you represent Tim's age on the y-axis and Melissa's age on the x-axis?

Joyce paid $220 for an item at the store that was 25 percent of the original price. What was the original price?

Write 87.653 as a mixed number.

Guy wants to swim 500 meters. After 75 meters, he takes a break. What percent of his goal has he already met?

The area of a parallelogram is 96 cm squared the height is 4 cm less than the length what is the length

Is the function in the table linear or nonlinear and why? x y 0,-100 and 1,-50 and 2,0 and 3,100 and 4,150. (A) The function is not linear because there are negative values in the y values.

The median size of a new house grew from 1780ft in 1997 to 2223ft in 2008. What is the percent of increase?

Can sombody tell me what is 10=-2c+22

What is the equivalent expression for a+a+a

What does the ratio of water and flour 10:4.5 mean?