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sweet-ann [11.9K]
3 years ago
14

David received $50 dollars for working at his father’s store. He spent $20 dollars at the movies, and $10 dollars buying comic b

ooks. After buying $5 worth of candy, he saved the rest. What is the ratio of the amount of money David spent to the amount that David saved?
Mathematics
1 answer:
statuscvo [17]3 years ago
5 0
Total amount of money received by David for working at his father's store = $50
Amount of money spent by David at the movies = $20
Amount of money spent by David buying comics books = $10
Amount of money spent by David buying candy = $5
Then
Total amount spent by David = (20 + 10 + 5) dollars
                                               = 35 dollars
Amount of money saved by David = (50 - 35 ) dollars
                                                       = 15 dollars
So
The ratio of the amount of money David
spent to the amount of money David saved = 35:15
                                                                      = 7:3
So the ratio of the amount of money David spent to the amount of money David saved is 7:3
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See attachment for graph

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Papessa [141]

Answer:

x = - 1 + \sqrt{17}\\and\\x = - 1 - \sqrt{17}\\

Step-by-step explanation:

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x^2 +2x +1 = 17

subtracting 17 from both sides

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In a restaurant, the proportion of people who order coffee with their dinner is p. A simple random sample of 144 patrons of the
mote1985 [20]
<h2>Answer with explanation:</h2>

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Null hypothesis : H_0: p\geq0.85   [ it takes equality (=, ≤, ≥) ]

Alternative hypothesis : H_1: p  [its exactly opposite of null hypothesis]

∵Alternative hypothesis is left tailed, so the test is a left tailed test.

Test statistic : z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

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Since the calculated value of test statistic is greater than the critical value , so we failed to reject the null hypothesis.

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