Suppose y varies directly as x. Find x when y = 10 if y = -7 when x = -14

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

In priyas math class there are 10 boys and 15 girls. what is the ratio of boys to girls in priyas math class? express your answer as a decimal