A study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while driving. Suppose a random sample of 10
1 answer:
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From any proportion, we get another proportion by inverting the extremes (or the means):
so we have:
2x=3k
2x+y=2k therefore:
3k+y=2k
y= - k
x=
The corect answer is A. -3/2
or:
From any proportion, we get another proportion by inverting the extremes and the means:
We use a property of proportions:
so we have
3y = - 2x