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3 years ago

HELP PLEASE !!!!

Mathematics

2 answers:

kirill [66]3 years ago

8 0

Answer:

13 dimes

Step-by-step explanation:

If Maggie has only dimes and quarters in her purse. She has 27 coins with a total value of $4.05 in her purse. How many dimes does Maggie have in her purse then all you would have to do is divide 27 by .25

dimulka [17.4K]3 years ago

5 0

1. Let the shorter piece be x in. long
the longer piece will be x + 13 in. long
and the two pieces add up to be 47 in., so
x + ( x + 13 ) = 47
2x = 47 - 13
2x = 34
x = 17
the longer piece is x + 13 in. long,, or 17 + 13 = 30 in. long

2. number of dimes: x
number of quarters: y
x + y = 27....(1)
10x + 25y = 405...(2)
(1)*10: 10x + 10y = 270....(3)
(2) - (3):15y = 135
y = 9
plug y = 9 into (1), you will find that x = 18
so 18 dimes, 9 quarters

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Answer:

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Given : The proportion of students at a college who have GPA higher than 3.5 is 19%.

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The mean and the standard error of the sampling distribution of the sample proportions will be :-

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Hence , the mean and the standard error of the sampling distribution of the sample proportions :

$\mu_{\hat{p}}=0.19$

$\sigma_{\hat{p}}=0.0785$

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