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bezimeni [28]
3 years ago
6

Write and solve a real-world problem that can be modeled by the equation 0.75x-18.50=0.65x

Mathematics
1 answer:
Scilla [17]3 years ago
6 0
Diana had chocolate, and ate some, leaving 0.75 of it for Sarah.

Sarah ate 18.5 grams of it and return the rest to Diana, which was 65% of the original chococate.

how much chocolate did Diana have at the beginning?

and the solution is:

0.75x-18.50=0.65x

0.75x-0.65x=18.50
0.1x=18.50
x=185

so Diana had 185 grams of chocolate.



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Given n = 875 and pˆ = 0.45, find the margin of error E that corresponds to a 95% confidence level.
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Answer:

The margin of error E that corresponds to a 95% confidence level is: E=0.03297

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Level of significance = 1-level of confidence

Level of significance = 1-0.95 = 0.05

The formula for the error is:

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So:

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8 0
3 years ago
Find the 23rd term in the sequence 2, 6, 10, 14, 18, 22
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Hello!

First you have to find the rule that the sequence is going by

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Next you subtract the first number

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Hope this helps!
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3 years ago
Read 2 more answers
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