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Mathematics 50 Online
OpenStudy (anonymous):

Adrian must choose between two long distance plans. Plan a charges a monthly fee of $15, plus $0.07 per minute one every long-distance call. Plan b charges a monthly fee of $50 for unlimited long- distance calss ( that is, no cost per minute). How many minutes of long-distance calls would it take for the two plans to cost the same @CGGURUMANJUNATH

563blackghost (563blackghost):

First we need to put plan A into an equation....

OpenStudy (anonymous):

ok?

563blackghost (563blackghost):

So how would you put it into an equation?

OpenStudy (anonymous):

i don't really know, i been working on this question for an hour, i couldn't figured it out

563blackghost (563blackghost):

Well I'll explain it as best as I can.... First we must put plan A into an equation so... it says that they pay $15 per month "plus" $0.07 per minute of calling soooo....the plus indicates that we are going to add.... \[15 + ? = ?\] We also know of how much they pay per minute which is $0.07 but we dont know is the total minutes so we input this...\[15 + 0.07x \] This is the equation for plan A... Do you get it?

OpenStudy (anonymous):

do we equal two equations together a=b

OpenStudy (anonymous):

and then solve??

563blackghost (563blackghost):

Yup! We will simplify the equation but the setup is this...\[15 + 0.07x = 50\] 50 is for plan A... do you know how to simplify this equation?

OpenStudy (anonymous):

i got 500 is that right?

563blackghost (563blackghost):

Correct! So it would take 500 minutes of calling to get equal costs!

OpenStudy (anonymous):

thank you so much for helping me! i really appreciate it! but i have one more last one! will you help me with it? :)

563blackghost (563blackghost):

Sure!

OpenStudy (anonymous):

the sum of two integers is 131. the larger integer is 8 more than twice the samller integer. find the two inegers

OpenStudy (anonymous):

i did 2x+8=131 and then i subtracted both sides by 8 i got 123 divide by 2

OpenStudy (anonymous):

i got 61.5 and then i subtracted 131-61.5 to find the other integer

OpenStudy (anonymous):

did i do it right?

563blackghost (563blackghost):

Yup! Your process is correct! I would have done that way as well xD

OpenStudy (anonymous):

thank u so much :)

563blackghost (563blackghost):

Np xD Glad to Help! "Thank you" for asking the question xD

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