3 years ago

Please solve and explain your answer

Mathematics

1 answer:

zubka84 [21]3 years ago

7 0

I think this is right. you can ask your teacher about second one.

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A new pair of skates cost $75. They are on sale for 10% off. Sales tax is 8%. If you purchased the skates, how much would you pa

Aleonysh [2.5K]

Answer:

72.9

Step-by-step explanation:

10% off 75 gets you to 67.5

8% more than 67.5 is 72.9

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3 years ago

HELP ASAPP!!!! PLZZZ

liberstina [14]

Answer:

x = 4

Step-by-step explanation:

35/60 = (5x+1+35)/96

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3 years ago

martina must choose a number between 49 and 95 that is multiple of 2,8 and 10. write all the numbers that she could choose.

gtnhenbr [62]

Answer:

Step-by-step explanation:

10 limits it to 50, 60, 70, 80, and 90

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2 years ago

The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.30, and the sample statistics

IrinaK [193]

Answer: 0.84

Step-by-step explanation:

let p be the population proportion of adults who smoked a cigarette in the past week.

As per given , we have

$H_a: p$

Sample size : n= 1491

The sample proportion of adults smoked a cigarette= $\hat{p}=\dfrac{x}{n}=\dfrac{462}{1491}=0.30985915493\approx0.31$

The test statistic for proportion is given by :-

$z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

Substitute all the values , we get

$z=\dfrac{0.31-0.30}{\sqrt{\dfrac{0.30(1-0.30)}{1491}}}\\\\=\dfrac{0.01}{\sqrt{0.000141}}\\\\=\dfrac{0.01}{0.011874342087}=0.84261497731\approx0.84$

Hence, the value of the test statistic = 0.84

6 0

3 years ago

What is 91 divided by 0.7

Tomtit [17]

Well i got 130.

hope it helps : )

4 0

3 years ago

Read 2 more answers