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Anastasy [175]
3 years ago
13

5 1/2+7 3/4 what is it​

Mathematics
2 answers:
Y_Kistochka [10]3 years ago
6 0

42/6 but if you want to simplify, it's 7

alina1380 [7]3 years ago
6 0

Hello from MrBillDoesMath!

Answer:

13 1/4

Discussion:

As 1/2 = 2/4

5 1/2 + 7 3/4 =

5 2/4 + 7 3/4 =

12 5/4 =

13 1/4

Thank you,

MrB

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Ellen is excited to learn how to ski. She went to White Peaks Mountain, rented a pair of skis for $45, and took 4 hours of group
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Answer:

x=30h

Step-by-step explanation:

First, you need to figure out how much she actually paid for lessons, so you need to subtract 45 from 165.

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You know she took four hours of lessons, so you divide 120 by 4.

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It takes $30 an hour for lessons.

Now you can form an equation.

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3 years ago
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Afina-wow [57]

Answer:

z=14.73

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for 99% confidence level the null hypothesis is rejected, thus majority of us adults would not bothered if the NSA collected personal records.

Step-by-step explanation:

H_{0}: Half of US adults would not bothered if the NSA collect records of personal telephone calls

H_{A}: Majority of the adults would not bothered if the NSA collect records of personal telephone calls

According to the sample, z-value can be found using the formula:

z=\frac{X-M}{\sqrt{n*p*(1-p)} } where

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  • n is the sample size (514)
  • p is the proportion of the sample, who said they would not bothered ( \frac{397}{514} ≈ 0.77)

Putting these numbers in the formula,

z=14.73  and corresponding p value is p≈0.000

Since p<0.01,  for 99% confidence level we reject the null hypothesis, thus majority of us adults would not bothered if the NSA collected personal records.

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