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malfutka [58]
3 years ago
13

2/3 of a class are girls

Mathematics
1 answer:
Novay_Z [31]3 years ago
6 0

Answer:

a.) 2:1

b.)1:2

Step-by-step explanation:

girls=2/3 *100=%66.66

boys=1/3 *100=%33.33

a.)66.66/33.33 = 2:1

b.)33.33/66.66 = 1:2

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Answer:

not trying to be mean i have no idea  please do not get mad at me i am 9 years old i want points so i am trying to awnser but it is hard for me i am in 4th grade.

Step-by-step explanation:

5 0
2 years ago
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1. Walmart’s stock price started at $70. It went up by $2, then went down by $4. What is the final stock price?
Paul [167]

Answer:

68

Step-by-step explanation:

70+2-4= 68

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2 years ago
What is the product?<br><br> 2x(x – 4)
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Keywords:

<em>Product, factors, polynomial, distributive property </em>

For this case we must find the product of two factors of a polynomial. To do this, we must apply the distributive property, which states: a (b + c) = ab + ac.

So:

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Answer:

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6 0
3 years ago
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IQ scores on the WAIS test approximate a normal curve with a mean of 100 and a standard deviation of 15. What IQ score is identi
riadik2000 [5.3K]

Answer:

IQ scores of at least 130.81 are identified with the upper 2%.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

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What IQ score is identified with the upper 2%?

IQ scores of at least the 100 - 2 = 98th percentile, which is X when Z has a p-value of 0.98, so X when Z = 2.054.

Z = \frac{X - \mu}{\sigma}

2.054 = \frac{X - 100}{15}

X - 100 = 15*2.054

X = 130.81

IQ scores of at least 130.81 are identified with the upper 2%.

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3 years ago
Can the sides of a triangle have lengths 1, 3, and 10?
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Answer:

yes the sides of a triangle can have all those sides

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