Answer:
12
Step-by-step explanation:
You could actually list the numbers between (but not including) 45 and 58:
{46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57}. I count 12 numbers here.
3d+ 3s = $21 because they bought three drinks and three snacks
I’m assuming you want it in slope intercept form so it’s y=1/6x-2