Why did americans make risky investments in the stock market? they hoped their investments would lead to higher prices for farm products. they took risks in the hope that they would get rich quick. they had plenty of money to fall back on if their investments didn't work out.

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?