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3 years ago

How many 3 digit numbers have exactly 2 digits that are the same

Mathematics

1 answer:

densk [106]3 years ago

7 0

Answer:

I believe 252

Step-by-step explanation:

Answer: 9+3×9×9 = 9+243 = 252 possible 3-digit numbers with at least

2 digits the same.

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Onny wants to buy a guitar that costs $600. He makes $2 per day. How many days will it take Onny to save enough money to buy the

lana66690 [7]

Answer:

300 days

Step-by-step explanation:

What you have to do is divide 600/2. Then you get 300.

Hope it helped :)

4 0

2 years ago

The times of the runners in a marathon are normally distributed, with a mean of 3 hours and 50 minutes and a standard deviation

serious [3.7K]

The probability that a randomly selected runner has a time less than or equal to 3 hours and 20 minutes is 0.16 or 16%.

<h3>What is normally distributed data?</h3>

Normally distributed data is the distribution of probability which is symmetric about the mean.

The mean of the data is the average value of the given data.

The standard deviation of the data is the half of the difference of the highest value and mean of the data set.

The times of the runners in a marathon are normally distributed, with

Mean of 3 hours and 50 minutes
Standard deviation of 30 minutes.

Refere the probabiliity table attached below. The probability of Z being inside the 1 Standard daviation of mean is 0.84.

The probability of runner selected with time less than or equal to 3 hours and 20 minutes,

$P=1-0.84\\P=0.16$

Thus, the probability that a randomly selected runner has a time less than or equal to 3 hours and 20 minutes is 0.16 or 16%.

Learn more about the normally distributed data here;

brainly.com/question/6587992

4 0

1 year ago

List the steps that should be used to solve the equation f(x) = g(x) by graphing when f(x) = (1/2)² - 3 and g(x) = 3x + 5?

jolli1 [7]

value of x is: $x=\frac{-31}{12}$

Step-by-step explanation:

We need to solve the equation f(x)=g(x)

where $f(x)=(\frac{1}{2})^2-3$

and $g(x) = 3x + 5$

Solving to find f(x)=g(x)

Putting values of f(x) and g(x)

$f(x)=g(x)\\(\frac{1}{2})^2-3=3x + 5\\\frac{1}{4}-3=3x + 5\\Subtarct\,\,5\,\,on\,\,both\,\,sides:\\\frac{1}{4}-3-5=3x + 5-5\\\frac{1}{4}-8=3x\\Taking\,\,LCm\,\,on\,\,left\,\,side\\\frac{1-8*4}{4}=3x\\\frac{-31}{4}=3x\\Divide\,\,both\,\,sides\,\,by\,\,3\\x=\frac{-31}{4*3}\\x=\frac{-31}{12}$

So, value of x is: $x=\frac{-31}{12}$

The graph will be a straight line x= -2.58 or x = -31/12

Keywords: Composition of Functions

Learn more about Composition of Functions at:

#learnwithBrainly

7 0

3 years ago

Simplify 2.5 (16/2-2.3) - 2

dsp73

Answer:

it's just ( -3.3 )but I need to put 20 + words and stuff so read this if you would like

7 0

2 years ago

Which represents the number of times all outcomes less than a given outcome occur? cumulative frequency relative frequency frequ

max2010maxim [7]

Answer: cumulative frequency

Step-by-step explanation:

A frequency is the number of times a data value occurs.
A relative frequency is the fraction or proportion of times an answer occurs.

The cumulative frequency analysis is the analysis of the frequency of occurrence of values of a phenomenon less than a reference value.

In a data set, the cumulative frequency for a value x is the total number of scores that are less than or equal to x.

Hence, cumulative frequency represents the number of times all outcomes less than a given outcome occur.

5 0

3 years ago