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Mathematics 9 Online
undeadknight26 (undeadknight26):

Is this right?

undeadknight26 (undeadknight26):

Sandra uses her office fax machine to send fax at the rate of $0.10 per page. She decides to rent a fax machine for $80 a year. The cost of sending a fax using the rented machine is $0.06 per page. Part A: Write an inequality that can be used to calculate the number of pages that Sandra should fax in a year so that the amount she pays for the rented machine is less than the office machine. Define the variable used. (5 points) Part B: How many pages should Sandra fax in a year to justify renting the fax machine? Show your work. (5 points)

undeadknight26 (undeadknight26):

Part A: .06x * 12 > 80 x is the amount of pages sent Part B: She should fax 111 pages because: .06 * 12 = .72 80/.72 = 111.11

OpenStudy (amistre64):

rent < office rent = .06p + 80 office = .10p when is: .06p + 80 < .10p ?

OpenStudy (amistre64):

p is the amount it cost to do 1 "p"age

undeadknight26 (undeadknight26):

k...and i solve it like this?

OpenStudy (amistre64):

i would ....

OpenStudy (amistre64):

the rental costs us: 80, plus .06 for each page: 80 + .06p the office just costs us .10 for each page: .10p rental cost is less than office cost gives us a rule to use; solving for p justifies the rental

undeadknight26 (undeadknight26):

Can you show me how???

undeadknight26 (undeadknight26):

8.6/.10??? 86 pages?

undeadknight26 (undeadknight26):

@amistre64 come back!!!

undeadknight26 (undeadknight26):

@SolomonZelman @agent0smith @BulletWithButterflyWings @charlotte123 please help me!!!

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