Which set of ordered pairs represents a function? answer choices {(2, 1), (5, 3), (6, 4), (1, 4)} {(5, 12), (7, 34), (9, 3), (9, 41)} {(5, 6), (5, 23), (4, 71), (3, 41)} {(11, 62), (11, 24), (4, 75), (31, 21)}

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Oliver read for 450 minutes this month his goal was to read for 10% more minutes next month if all of her medicine go how many minutes will you read all during the next two months

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.