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liamgreene90
30.07.2019 •
Mathematics
Ahealth club charges a one-time initiation fee and a monthly fee. john paid 100 dollars for 2 months of membership. however, peter paid 200 for 6 months of membership. how much will sylvia pay for 1 year of membership?
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Ответ:
y=one-time inititation fee
y+2x=100 (equation for John)
y+6x=200 (equation for Peter)
We have to compute the following system of equations:
y+2x=100
y+6x=200
We can solve this system by substitution systme:
y+2x=100 ⇒ y=100-2x
y+6x=200
(100-2x)+6x=200
4x=200-100
4x=100
x=100/4=25
We find out the value of "y"
y=100-2x
y=100-2(25)
y=100-50
y=50
one-time initiation fee is $50 and monthly fee is $25
We find out how much will Sylvia pay for a year of mebership.
sylvia will pay=y+12x
sylvia will pay=$50+12*$25=$50+$300=$350
sylvia will pay $350.
Ответ:
he last ratio is written incorrectly.
Mandy reversed the input and output in the numerator and denominator.
The correct ratio is 50/10.
The relationship is proportional.