Penelope is going to the carnival to ride the rides. It's cost $20 to get into the carnival and ride tickets are $0.50 each. The correct equation was. 50x + 20 = 35. So, how many tickets did she buy?

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years