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PSYCHO15rus [73]
3 years ago
10

Y varies directly as x and y = 10 when x =2.5 find y if x y = 80 cm.

Mathematics
1 answer:
densk [106]3 years ago
6 0

If y = 80, x = 20

Hope this helps.

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PLEASE ANSWER + BRAINLIEST!!!!
kupik [55]
So, let's begin...
First off, you must note that the question is asking for the d value when you substitute the value of c(x).
You are given the following information:
1. The c(x) value is already given to be 0.75x.
2. The equation to find d of (any value) is 0.8y-5.

So, substitute the value of 0.75x as a y value into 0.8y - 5. This is because you are substituting the value of c(x) for d. This is equal to 0.8 times 0.75x - 5. This is equal to 0.6x - 5, which is the function. Thus, your final answer is d(c(x)) = 0.6x - 5.
If you have any questions please comment. Otherwise, hope this helps! :)
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