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Andre45 [30]
3 years ago
14

Jose bought a magazine for $6 and five notepads. He spent a total of $26. How much did each notepad cost?

Mathematics
1 answer:
bixtya [17]3 years ago
8 0
4 dollars. 26-6=20. 20/5=4
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A paint machine dispenses dye into paint cans to create different shades of paint. The amount of dye dispensed into a can is kno
Reika [66]

Answer:

The 90th percentile of the distribution is 6.512 ml.

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 6 milliliters (ml) and a standard deviation of 0.4 ml.

This means that \mu = 6, \sigma = 0.4

Find the dye amount that represents the 90th percentile (i.e. 90%) of the distribution.

This is X when Z has a p-value of 0.9, so X when Z = 1.28. Then

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

1.28 = \frac{X - 6}{0.4}

X - 6 = 1.28*0.4

X = 6.512

The 90th percentile of the distribution is 6.512 ml.

3 0
3 years ago
You need a 15% acid solution for a certain test, but your supplier only ships 5% solution and 17.5% solution. If you need 20 lit
Nimfa-mama [501]

Answer:

4 liters of 5% and 16 liters of 17.5%

Step-by-step explanation:

Let quantity of 5% be x liters and of 17.5% be y liters

x+y=20 hence y=20-x

Introducing percentages

0.05x+0.175(20-x)=0.15*20

0.05x+3.5-0.175x=3

-0.125x=-0.5

x=\frac {-0.5}{-0.125}=4

Therefore, y=20-x=20-4=16

You need 4 liters of 5% and 16 liters of 17.5% to achieve 20 liters of 15% acid solution

6 0
2 years ago
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A bamboo plant grows about 1.26 feet each
JulsSmile [24]

Answer:

8.82 feet in one week hopes it's helps

5 0
2 years ago
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I need the awnser ASAP plz!!​
Ganezh [65]

Answer:

it is D

Step-by-step explanation:

the ratio is 1.5 so multiply 15 by 1.5

3 0
3 years ago
Please help me out, thanks!
krok68 [10]

Answer:

See below.

Step-by-step explanation:

A. Converting 2/9 to a decimal:

   -------------------------------------

9 ) 2.0

                                                                                                                   _

the quotient is  0.2 recurring (0.2222.........) which can be written as 0.2

8 0
3 years ago
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