Question

Cell Phone Company A charges $20 each month plus $0.03 per text. Cell Phone Company B charges $5 each month plus $0.07 per text.

Answer 1

Cost of company A=monthlyfee+text=20+0.03t where t=number of texts
A=20+0.03t

company b is monthlyfee+texts=5+0.07t
B=5+0.07t



1.
c=20+0.03t
c=5+0.07t
using c for cost is confusing because we can't tell which is for which company



2.

equal, means the costs are equal so
20+0.03t=5+0.07t
minus 5 from both sides
15+0.03t=0.07t
minus 0.03t from both sides
15=0.04t
divide both sides by 0.04
375=t
the answer is 375 texts

Answer 2

1. 20c + 0.03t = total
    5c + 0.07t = total

2. To find if they're equal, set them both equal to each other. Since it's one month, set c to 1.

20c + 0.03t = 5c + 0.07t
20 + 0.03t = 5 + 0.07t
15 = 0.04t
375 = t

Hope this helps!