An internet provider charges an install fee of $49 and a monthly fee of $99. The total bill was $544. Write an equation to find out how many months were paid for.

B = $49 + $99m is a good equation; they don't actually ask for the number of months to be found, but I showed it anyway

Step-by-step explanation:

Let B be the total bill amount.

Let m be the number of months of service provided.

Then the bill total,

B,   is  $49 for install + $99 times the number of months of service.

B  =   $49                 +   $99 x m

*** B = $49 + $99m

Now, we know B is $544, so

544 = 49 + 99m

-49     -49

495  =  99m

495/99  = 99m/99

5   =   m

*** After 5 months, the bill is $544

he spend 5.1 minutes chatting with his friends.

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5.1