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7 Cards in this Set
- Front
- Back
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What are the two types of proportions?
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>Direct
>Inverse |
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a) A is directly proportional to B^2. When A = 50, B = 10. Find an equation connecting A and B.
b) Find the value of B when A = 72 |
a) A alpha B^2
A = kB^2 50 = k10^2 50 = k100 50/100 = k = 0.5 A = 0.5B^2 b) 72 = 0.5B^2 72/0.5 = b^2 = 144 S.R of 144 = 12 |
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Alpha =
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proportional
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a) y is inversely proportional to x. When y = 16.5, x = 20. Find an equation connecting y and x.
b) Find x when y = 75 |
a) y alpha 1/x
y = k/x 16.5 = k/20 16.5 x 20 = k = 330 y = 330/x b) 75 = 330/x 330/75 = x = 4.4 |
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Convert 0.351351351 to fraction.
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1000x = 351.351
- x = 0.351 999x = 351 x =351/999 = 117/111 = 13/37 |
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What is the fraction button on a calculator?
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a^b/c
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Express 0.0848484 as a fraction.
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x = 0.0848484
1000x = 84.84 - 10x = 0.84 990x = 84 x = 84/990 = 28/330 = 14/165 |
