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3 years ago

Bert's age plus twice Ernie's age is 30. Three times Bert's age plus 8 times Ernie's age is 108. How old are Bert and Ernie?

Mathematics

1 answer:

Veronika [31]3 years ago

5 0

Answer:

Bert's age is 15 Ernie's age is 53

Step-by-step explanation:

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denpristay [2]

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The answer to this question is not 36/25 but 6 1/10.

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3 years ago

Factor x squared-6x+3x-18 by grouping

Sindrei [870]

Answer:

(x - 6)(x + 3)

Step-by-step explanation:

Given

x² - 6x + 3x - 18 ( factor the first/second and third/fourth terms )

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3 years ago

a square measuring 9 inches by 9 inches is cut from the corners of a square measuring 15 inches by 15 inches what is the area of

Alexandra [31]

Answer:

Step-by-step explanation:

It would be the area of the big square minus the area of the small square.

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3 years ago

Simplify to lowest form.<br> a. 1/2 + 3/2 = ?<br><br> b. 2/5 + 3/5 = ?

forsale [732]

For letter the answer is 2

for letter b the answer is 1

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3 years ago

Read 2 more answers

The proportion of items in a population that possess a specific attribute is known to be 0.45. a. If a simple random sample of s

yanalaym [24]

Answer: 0.05

Step-by-step explanation:

Sampling error is the error occurs by considering sample for study instead of entire population.

Given : The proportion of items in a population that possess a specific attribute is known to be 0.45.

Sample size : n= 100

Sample proportion of items in a population that possess a specific attribute : $\hat{p}=0.48$

Now, the formula to find the sampling error :

$\text{Sampling error} =\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$\text{Sampling error} =\sqrt{\dfrac{0.48(1-0.48)}{100}}$

$=\sqrt{\dfrac{0.48(0.52)}{100}}\\\\=\sqrt{0.002496}\approx0.05$

Hence, the sampling error =0.05

4 0

3 years ago