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kondaur [170]
4 years ago
13

Evaluate the expression when m = 6 and n = 31.

Mathematics
1 answer:
Usimov [2.4K]4 years ago
5 0

Answer:

7

Step-by-step explanation:

n-4m= 31  - 4(6) = 31 -24 = 7

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In the United States, the mean and standard deviation of adult men's heights are 70 inches (5 feet 10 inches) and 4 inches, resp
Artyom0805 [142]

Answer:

P(X>72)=P(\frac{X-\mu}{\sigma}>\frac{72-\mu}{\sigma})=P(Z>\frac{72-70}{4})=P(z>0.5)

And we can find this probability using the complement rule and the normal standard table:

P(z>0.5)=1-P(z

And the best solution would be:

c. 0.3085

Step-by-step explanation:

For this case we can convert all the values to inches in order to standardize the solution:

5ft * \frac{12 in}{1ft}= 60 in

6ft * \frac{12 in}{1ft}= 72 in

Let X the random variable that represent the heights of US mens, and for this case we know the distribution for X is given by:

X \sim N(70,4)  

Where \mu=70 and \sigma=4

We are interested on this probability

P(X>72)

We can use the z score formula given by:

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

Using this formula we got:

P(X>72)=P(\frac{X-\mu}{\sigma}>\frac{72-\mu}{\sigma})=P(Z>\frac{72-70}{4})=P(z>0.5)

And we can find this probability using the complement rule and the normal standard table:

P(z>0.5)=1-P(z

And the best solution would be:

c. 0.3085

5 0
3 years ago
Each of 7 students reported the number of movies they saw in the past year. Here is what they reported.
rusak2 [61]

Answer:

11

Step-by-step explanation:

6 0
3 years ago
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Y = 14x + -10<br> y = 7x +-3
vfiekz [6]

Answer:

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Step-by-step explanation:

7 0
4 years ago
Tom received a $70 gift card for a cafe. He used it to buy some coffee that cost $7.73 per pound. After buying the coffee, he ha
mart [117]

Answer: He bought 6 pounds of coffee.

Step-by-step explanation:

Money he have = 70

money he used to buy = 70.00 - 23.62 = 46.38

so

7.73 dollar = 1 pound

1 dollar = 1/(7.73) = 100/773 pound

46.38 dollar = (100/773) * 46.38 = 6 pound

5 0
3 years ago
6x - 2 ( x + 4 )= 12
ElenaW [278]

Answer:

x = 5

Step-by-step explanation:

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3 years ago
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