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OpenStudy (wanell):
?
OpenStudy (mousejkl):
this is it
OpenStudy (mousejkl):
help me
OpenStudy (welshfella):
the equation to work out marcus's earnings is given to us y = 15x where x = number of hours worked
OpenStudy (welshfella):
we now have to find the equation for number of hours worked by melinda
Note that melinda earns 75 dollars for 0 hours work
- and after that she earns 12 dollars for every hour
so can you work out her equation?
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OpenStudy (welshfella):
* equation for the amount earned by melinda
OpenStudy (welshfella):
Marcus's equation was y = 15x because he earns $15 per hour
- but melinda earns $12 per hour so part of melinda's equation will be 12x
- do you follow that reasoning?
OpenStudy (welshfella):
@mousejkl?
OpenStudy (mousejkl):
thank you
OpenStudy (mousejkl):
is that all
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OpenStudy (welshfella):
No you also have to add on the 75 dollars to get melindas equation
OpenStudy (welshfella):
so for melinda :- y = 12x + 75
OpenStudy (welshfella):
when they have both earned the same amout the y's are equal so we can say
15x = 12x + 75
now solve this equation for x
then you can find the answer by pluggging in this value of x into one of the equations
- plug it into y = 15x
this value of y gives the answer
OpenStudy (mousejkl):
is that all now
OpenStudy (welshfella):
yes finding x and y above will give you the answer ( y = amount of money earned )
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