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3 years ago

Kylie has 14 polished stones. Her friend gives her 6 more stones. Write an expression to match the words

Mathematics

2 answers:

Alla [95]3 years ago

7 0

14+6 you might have to put the answer but in this case maybe not

Elis [28]3 years ago

3 0

An expression is like an equation, but without an equal sign.

Therefore, you could say...

14 stones + 6 stones

or just...

14 + 6

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Ivenika [448]

Answer:

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Step-by-step explanation:

Given :

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Area (a) = 210.21mm^2

Height (h) = ?

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3 years ago

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makvit [3.9K]

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3 years ago

Construct a 95% confidence interval for the population mean, µ. Assume the population has a normal distribution. A sample of 25

bixtya [17]

Answer:C. (77.29, 85.71)

Step-by-step explanation:

We want to determine a 95% confidence interval for the mean test score of randomly selected students.

Number of sample, n = 25

Mean, u = 81.5

Standard deviation, s = 10.2

For a confidence level of 95%, the corresponding z value is 1.96. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean +/- z ×standard deviation/√n

It becomes

81.5 +/- 1.96 × 10.2/√25

= 81.5 +/- 1.96 × 2.04

= 81.5 +/- 3.9984

The lower end of the confidence interval is 81.5 - 3.9984 =77.5016

The upper end of the confidence interval is 81.5 + 3.9984 =85.4984

Therefore, the correct option is

C. (77.29, 85.71)

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3 years ago

Y=x^2-8,4x+y=-8 how do you solve

Ber [7]

Do the variable first (x^2 +4x) then do y+y-8

8 0

3 years ago