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ELEN [110]
3 years ago
13

Five more than a twice a number is less than 20. If the number is a whole number, what could the number be?

Mathematics
2 answers:
ycow [4]3 years ago
8 0

Answer:

C

Step-by-step explanation:

5+2x<20

20-5=15

15/2=7.5

SOVA2 [1]3 years ago
5 0

Answer:

C

Step-by-step explanation:

5 more than twice a number

(A number)=variable=x

2x+5<20

Subtract 5 from both sides

2x<15

Divide by 2

x<7.5

Any number below 7.5 (can't be 7.5 though)

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Answer:

The correct option is (b).

Step-by-step explanation:

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The confidence interval for population mean can be computed using either the <em>z</em>-interval or <em>t</em>-interval.

The <em>t</em>-interval is used if the following conditions are satisfied:

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For computing a (1 - <em>α</em>)% confidence interval for population mean , it is necessary for the population to normally distributed if the sample selected is small, i.e.<em>n</em> < 30, because only then the sampling distribution of sample mean will be approximated by the normal distribution.

In this case the sample size is, <em>n</em> = 28 < 30.

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