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maxonik [38]
3 years ago
8

A number that is at least 90

Mathematics
2 answers:
LUCKY_DIMON [66]3 years ago
8 0
Lets say a number is x

the expression is


x ≥ 90
prohojiy [21]3 years ago
8 0

Answer:

x\geq 90.

Step-by-step explanation:

Let x represent the number.

We have been given a sentence. We are supposed to translate our given sentence into an inequality.

We are told that the number is at-least 90. This means that our required number is greater than on equal to 90.

We can represent this information in an inequality as:

x\geq 90

Therefore, our required inequality would be x\geq 90.

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black pencils cost 75 naira each and colour pencils cost 105 naira each if 24 mixed pencils cost 2010 naira how many of them wer
KonstantinChe [14]

Answer:

number of black pencils is 17

7 0
3 years ago
What is the measure of angle x?​
aivan3 [116]

Answer:

83 is the measure of x.

Step-by-step explanation:

A triangle is equal to 180 degrees. So 180 - 53 - 44 = 83.

4 0
2 years ago
Read 2 more answers
A union of restaurant and foodservice workers would like to estimate the mean hourly wage, μ, of foodservice workers in the U.S.
pav-90 [236]

Answer:

n=(\frac{1.960(2.25)}{0.35})^2 =158.76 \approx 159

So the answer for this case would be n=159 rounded up to the nearest integer

Step-by-step explanation:

Assuming this complete question: A union of restaurant and foodservice workers would like to estimate the mean hourly wage, , of foodservice workers in the U.S. The union will choose a random sample of wages and then estimate using the mean of the sample. What is the minimum sample size needed in order for the union to be 95% confident that its estimate is within $0.35 of ? Suppose that the standard deviation of wages of foodservice workers in the U.S. is about $2.15 .

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

\sigma=2.25 represent the population standard deviation

n represent the sample size  

Solution to the problem

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{s}{\sqrt{n}}    (a)

And on this case we have that ME =0.35 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

The critical value for 95% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.025;0;1)", and we got z_{\alpha/2}=1.960, replacing into formula (b) we got:

n=(\frac{1.960(2.25)}{0.35})^2 =158.76 \approx 159

So the answer for this case would be n=159 rounded up to the nearest integer

3 0
3 years ago
In which of these cases is each stamp worth the most?
Alika [10]

3.15 /7 = 0.45

3.20/8 = 0.40

4.10/10 = 0.41

4.80/16 = 0.3


Answer is 1. 7 stamps worth 3.15

7 0
3 years ago
Read 2 more answers
HELP PLS <br> Which graph represents the equation y = x2-5?
wel
Y= x^2
Are you trying to graph the problem to??
3 0
3 years ago
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