Question

Tanisha's plan: $0.15 per minute used talking and a $25 monthly fee. Rebeca's plan:$0.10 per minute used talking and a $18.50 monthly fee. How many minutes the two plans will charge the same amount?

Answer 1

Tanisha and Rebecca would not have the same amount as time can't be negative . To further understand please see the explanation

Explanation:

Let first suppose "m" for minutes and then we equal the two equations to find the same amount .

0.15m + 25= 0.10 m + 18.50

Lets now solve the equation

0.15m -0.10m = 18.50 -25

m =
`(-6.5)/(0.05)`

m = -130 minutes .