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finlep [7]
3 years ago
8

2) A pair of jeans costs $80. The store is having a sale for 30% off. What would

Mathematics
1 answer:
Viefleur [7K]3 years ago
7 0

Answer:

$56

Step-by-step explanation:

$80 x .3 = $24

$80 - $24 = $56

You can also do $80 x .7 = $56.

Hope that helps!

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Mazyrski [523]
42 because you have to multiply the reciprocal
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3 years ago
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Sandra runs at a rate of 8 miles in 45 minutes how does her unit rate compared to terrance's and jessie's
alekssr [168]

We can't do this one because we don't know terrance's and jessie's unit rate

7 0
3 years ago
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.

Mean of 100 and a standard deviation of 15.

This means that \mu = 100, \sigma = 15

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%.

7 0
3 years ago
Helppppppppppp with 3 & 4!!!!!!!!!!!!!!!!!!!!!!!
Natalka [10]

Answer:

3 is b

4 is also b

Step-by-step explanation:

6 0
3 years ago
Write an equation for the line that is perpendicular to the line y= -9 that passes through the point (-3,4).
Liula [17]

Answer:

Step-by-step explanation:

x= -3

7 0
3 years ago
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