Question

Bob’s monthly phone bill is made up of a $10 fee plus $0.05 per minute. Bob’s phone bill for July was $22. Write an equation to model the situation using m to represent the number of minutes. Solve the equation to determine the number of phone minutes Bob used in July.

Answer 1

equation: 10 + 0.05x=22

Explanation:

the next step after writing the equation would be to subtract 10 from both sides to get 0.05x=12. after this you would then have to divide 12 by 0.05 to get 240 minutes. you could check it by putting 240 in for x to get 10+0.05(240)=22. you would then multiply 0.05 by 240 to get 12 and then add 10 onto it to get 22 which was already given.

Answer 2

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Answer:

equation: 10 +0.05m = 22

solution: Bob used 240 minutes in July

Explanation:

Bob's bill is the total of the fixed fee and the charges based on minutes. The latter is 0.05m, where m is the number of minutes. Hence, Bob's July bill is ...

10 + 0.05m = 22 . . . . . total of charges for July is $22

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The equation is solved by subtracting the constant and dividing by the coefficient of m.

0.05m = 12 . . . . . subtract 10

m = 12/0.05 = 240

Bob used 240 minutes in July.