Which ordered pair would lie on the y axis

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.

Erik buys 2.5 pounds of cashews. if each pound of cashews costs $7.70, how much will he pay for the cashews?

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6