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4 years ago

If the product of a number and -8 is subtracted from the number the result is 7 more than the number find the number

Mathematics

1 answer:

Leviafan [203]4 years ago

4 0

(-8x-x) 7+x I believe that's the answer

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Allison bought some shirts for her clothing store for $15 each. she received $50 off her entire purchase and spent a total of $4

Tom [10]

She Bought 23 shirts because if you do 400-50 you get 350 the / by 15 wich give you 23.333333ect

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3 years ago

The store has p packages of batteries. Each package contains 12 batteries. Write an expression that shows the number of batterie

photoshop1234 [79]

Hey:)

an expression that shows the number of batteries is '12p'

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2 years ago

The total of 8 and the product of x and 2

vagabundo [1.1K]

Answer:

8+2x

Step-by-step explanation:

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3 years ago

Henry's calculator is 2 1/4 inches wide and 5 1/4 inches long. What is the area of

grandymaker [24]

Answer:

189/16 inches squared

Step-by-step explanation:

When you are multiplying mixed numbers it is best to change them to improper fractions if it is easier for you.

2 1/4=9/4

5 1/4=21/4

If you simplify it, it will be 11.8125

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3 years ago

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.

zhannawk [14.2K]

Answer:

a) 0.6032

Lower limit: 0.48

Upper limit: 0.72

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

Question a:

In a random sample of 63 professional actors, it was found that 38 were extroverts.

We use this to find the sample proportion, which is the point estimate for p. So

$\pi = \frac{38}{63} = 0.6032$

Question b:

Sample of 63 means that $n = 63$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6032 - 1.96\sqrt{\frac{0.6032*0.3968}{63}} = 0.4824$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6032 + 1.96\sqrt{\frac{0.6032*0.3968}{63}} = 0.724$

Rounding to two decimal places:

Lower limit: 0.48

Upper limit: 0.72

7 0

3 years ago