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galina1969 [7]
3 years ago
15

What does this equal: 4 1/2 + 3 2/3=

Mathematics
2 answers:
professor190 [17]3 years ago
8 0
4 1/2 + 3 2/3 = 8.16666667
prohojiy [21]3 years ago
3 0
49/6 or 8 1/6 if you want to keep it a fraction but if not 8.166 (6 repeating)
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What is <br> the ratio equal for 90:18
Ann [662]
To find the ratio between 2 numbers, you need to find the GCF of those 2 numbers. If the GCF is the ratio, the ratio is in it's simplest form.
GCF of 90 and 18 is 18
divide both numbers by the GCF and the final simplest ratio is 5:1
4 0
3 years ago
Read 2 more answers
Solve for x -3x+5y=15
Goshia [24]

Answer: look at the picture

Step-by-step explanation: hope this help

8 0
3 years ago
For a given IQ test, an individual is considered a genius if their score falls more than three standard deviations from the mean
ki77a [65]

Answer:

P(Z>3) = 1-P(Z

So then the probability that an individual present and IQ higher than 3 deviation from the mean is 0.00135

And if we find the number of individuals that can be considered as genius we got: 0.00135*1500=2.025

And we can say that the answer is a.2

Step-by-step explanation:

1) Previous concepts

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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

2) Solution to the problem

Let X the random variable that represent the IQ scores of a population, and for this case we know the distribution for X is given by:

X \sim N(\mu=?,\sigma=?)  

We are interested on this probability

P(X>X+3\mu)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

And we can find the following probablity:

P(Z>3) = 1-P(Z

So then the probability that an individual present and IQ higher than 3 deviation from the mean is 0.00135

And if we find the number of individuals that can be considered as genius we got: 0.00135*1500=2.025

And we can say that the answer is a/2.0

3 0
3 years ago
Solve for r -4(r+6)= -49
tatiyna

Answer: r= 25/3

Step-by-step explanation:

r-4(r+6)=-49 distribute the 4

r-4r-24=-49 combine like terms

-3r-24=-49 add 24 to both sides

-3r=-25 divide by -3

r= 25/3 answer

7 0
3 years ago
There are 20 students in the classroom. 5 of these students are selected to go to an assembly. how many such selections are poss
Ksju [112]
Order of the people does not affect the total number of ways. Thus, we use combinations.

Total combinations: 20C5 = 15,504 ways.
4 0
3 years ago
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