What are the solutions to the system of equations?

y=x^2−5x+6
y=−4x+6
a. (−1, 0) and (0, 6)
b. (−1, 0) and (6, 0)
c. (0, −1) and (6, 0)
d. (0, 6) and (1, 2)

If 1 km = 0.621 miles, how many miles are in a centimeter

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Sara can take no more than 22 pounds of luggage on a trip.her suitcase weighs 112 ounces.how many more pounds can she pack without going over the limit?