Makeiah1000 Makeiah1000

23-06-2017
Mathematics

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The variable Z is directly proportional to X. When X is 12, Z has the value 36. What is the value of Z when X = 19

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gabby5792 gabby5792

23-06-2017

The easiest way to solve this is to make a proportion problem.
Here is what we have so far...
[tex] \frac{x}{z} [/tex]
[tex] \frac{x(12)}{z(36)} [/tex] = [tex] \frac{x(19)}{z} [/tex]
cross multiply
12z = 36 × 19
12z = 684
z = 57

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