John cut a 4 ft long piece of lumber into shorter pieces to repair his deck. He cut three pieces each 34 ft long, and two pieces each 12 ft long. How much wood did he have left?

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?