Edo plans on going to the amusement park this friday. It cost $10.00 to enter the park, And then $2.50 for every rode that edo goes on. Which choice is an equation that shows the relationship between rides, r and the total cost c

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827