I need help for this problem ​

Find the value of the variable and the length of each secant segment.

Keith runs 5 miles in 38 minutes. at the same rate, how many miles would he run in 57 minutes

Griffin ordered a pair of sneakers online. he had a $22 credit that he applied toward the purchase, and then he used a credit card to pay for the rest of the cost. if the shoes cost $58, how much did griffin charge to his credit card when he bought the sneakers?