You are trying to decide which cell phone plan to purchase. plan a chargeres $40 for a new phone and $20 a month for usage. plan b provides the phone for free, but has a fee of $30 a month for usage.

A because one time fees for a phone upgrade or initial phone are just one time. Look at the monthly fees instead would you rather pay more each month or less each month? If answer is less A is the best choice even though in the beginning you need to pay more.

Plan B is a better phone plan

Step-by-step explanation:

Step 1-

Plan A-

$40+ $20x=y

x- months

y- total

$40 plus $20 per month would give you the total

Plan B-

$30x=y

x- months

y- total

For Plan B you pay $30 a month for the total and the phone is free so you don't add anything to it.

Step 2-

Substitute x for different values to see how much it would cost for the phone plan per month

Plan A-

40+20(1)=60

So for 1 month it is $60

40+20(2)=80

So for 2 months it's $80

Plan B-

30(1)= 30

So for 1 month it would be $30

30(2)=60

So for 2 months it would be $60

Plan B would be the best plan because it is the cheapest and you get a free new phone

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.