if matt buy's a cola at $1.69,gets a refill 3 time, for cost of $.45 each: which answer best fit the problem!

Question

a.d=3-1.69+.45
b.1.69+3.45
c.d=1.60+0.45+3
d.3=3-1.69+0.45

Answer 1

none the way you typed them
it should be ...
cost = 1.69 + 3(.45)