a long-distance telephone call costs $1.65 for the first 3 minutes and $0.42 for each additional minute. how much will a 23-minute call cost

About $43.69.

Step-by-step explanation:

1.65+0.42t=20 you minus the 3 minutes from the 23 minutes because those are paid for by the 1.65. Then for every extra minute, you pay 42 cents.

1.65+0.42t=20

Subtract the 1.65

0.42t=18.35

t≈43.69

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.