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Mathematics 25 Online
OpenStudy (anonymous):

Luke trades working at the barn for riding the horses. This week he rode for 3.5 hours, which is 4.5 less than twice the number of hours he worked. How many hours did he work this week? Let h = the number of hours he worked. A. 4.5 - 2(3.5) = h; h = 2.5 B. 2(3.5) - 4.5 = h; h = 2.5 C. 3.5 = 4.5 - 2h; h = 0.5 D. 2(3.5) - 4.5 = h; h = 2.5

OpenStudy (anonymous):

@Opcode

jimthompson5910 (jim_thompson5910):

This week he rode for 3.5 hours, which is 4.5 less than twice the number of hours he worked translates to 3.5 = 4.5 - 2*(number of hours worked) so what is your equation?

OpenStudy (anonymous):

is it A?

jimthompson5910 (jim_thompson5910):

no that's incorrect

jimthompson5910 (jim_thompson5910):

replace "number of hours worked" with "h"

jimthompson5910 (jim_thompson5910):

you can do this because you made h = number of hours worked

OpenStudy (anonymous):

sorry I meant B. I didn't mean to say A.

jimthompson5910 (jim_thompson5910):

btw, choices B and D are identical is this a typo?

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

ok i see where the real answer is now

jimthompson5910 (jim_thompson5910):

it should be 3.5 = 2*(number of hours worked) - 4.5

OpenStudy (anonymous):

C!

jimthompson5910 (jim_thompson5910):

correct

OpenStudy (anonymous):

Dang. i was going to say that instead of B. i got all the letters confused. Thanks for explaining!

jimthompson5910 (jim_thompson5910):

yw

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