Jack bought a case of 12 calculators for $60.00. He sold six for $52.00 each and six for $56.00 each. How much was Jack's profit on the case of calculators?
A)
524.00
B)
$48.00
560.00
D)
$108.00

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 .

100 points, hi, i’m not sure what to do here,the data doesn’t seem to be quadratic .? can anyone me, in advance

How to solve a simultaneous equation involved with fractions?