Suppose you have a gift certificate worth $20 for one long-distance phone call. If the charge is $1.10 for the first minute and

Question

3 years ago

10

$0.42 for each additional minute, what is the longest that you can talk?

2 answers:

liberstina [14] · Answer 1 · 2022-05-09T23:13:41+03:00

4 0

You subtract i think

Alexxx [7] · Answer 2 · 2022-05-10T00:51:04+03:00

Answer:

46 minutes.

Step-by-step explanation:

You have a gift certificate worth $20 for one long-distance phone call.

The charge for the first minute = $1.10

Let the other additional minutes that you can talk = x

The charges for the x minutes = 0.42 per minute

the equation will be : 1.10 + 0.42x = 20

0.42x = 20 - 1.10

0.42x = 18.90

x = $\frac{18.90}{0.42}$

x = 45

1 minute for $1.10 + 45 minutes for $0.42/min.

you can talk for 46 minutes.