For each of seven consecutive years, arsh makes a model aeroplane. the sum of the ages of the three youngest model aeroplanes is 42 years. what is the sum of the ages of the three oldest model airplanes

An alternative to car buying is to make monthly payments for a period of time, and then return the vehicle to the dealer, or purchase it. this is called

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?

Find the value of x to the nearest tenth.