You need to purchase a new cell phone plan. company a offers 700 minutes of talk time per month but they charge 15 cents for every minute you go over the 700 included minutes. company a will charge you $40 per month for this plan. company b offers 500 minutes of talk time per month, but they charge only 5 cents per minute for exceeding the 500 minutes. company b charges $50 per month for this plan. at what number of minutes per month would both plans charge the same amount?

900 minutes

Step-by-step explanation:

Plan A: 700 free minutes + 15 cents per minute over 700 ($40)

Plan B: 500 free minutes + 5 cents per minute over 500 ($50)

The charges for x minutes (assumed x>700) for plan A will be

40+0.15(x-700)

The charges for x minutes (assumed x>500) for plan B will be

50+0.05(x-500)

To find the value of x where both charges are the same, we equate

40+0.15(x-700)=50+0.05(x-500)

Operating

40+0.15x-105=50+0.05x-25

Simplifying

0.10x=90

x=900 minutes

Both plans would charge the same amount when 900 minutes per month are used

i dont know

step-by-step explanation:

y=1/4x-4

step-by-step explanation: