It cost Mr. Packer $3.60 to send a 3-pound package using next-day service. At this rate, what will it cost him to send a 4-pound package? Which is the only proportion that can be used to solve this problem?​

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.