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OpenStudy (anonymous):
WILL MEDAL! Suppose p varies directly with d, and p=7 when d=3 What is the value of d, when p=28
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OpenStudy (karon86):
I'm here
OpenStudy (karon86):
Use cross multiplication
OpenStudy (anonymous):
?
OpenStudy (anonymous):
show me how
OpenStudy (karon86):
The formula for this is y1/x1=y2/x2
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OpenStudy (karon86):
y=p x=d
OpenStudy (karon86):
So just plug the values in the variables. 7/3=28/x
OpenStudy (anonymous):
Oh ok
OpenStudy (karon86):
Use cross multiplication to solve for x. 3 x 28 = 84
OpenStudy (karon86):
Then just divide 84 by 7
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OpenStudy (anonymous):
12
OpenStudy (karon86):
x = 12 :)
OpenStudy (anonymous):
thanks man
OpenStudy (karon86):
Goodjob :D You welcome :D
OpenStudy (karon86):
Thanks :D
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OpenStudy (anonymous):
ur welcome
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