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olga2289 [7]
3 years ago
12

The sum of Alan’s age and Bob’s age is 40.

Mathematics
1 answer:
Nutka1998 [239]3 years ago
8 0
Carl is 2 yrs older than bob. Because Alan+Carl is 2 more than Alan+bob
So bob=16 and Carl is 18
16+18=34
And Alan is 24
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masya89 [10]
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7 0
3 years ago
The heights of students at a college are normally distributed with a mean of 175 cm and a standard deviation of 6 cm. One might
frosja888 [35]

Answer:

25

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 175cm

Standard deviation = 6 cm

Percentage of students below 163 cm

163 = 175 - 2*6

So 163 is two standard deviations below the mean.

By the Empirical rule, 95% of the heights are within 2 standard deviations of the mean. The other 100-95 = 5% are more than 2 standard deviations of the mean. Since the normal distribution is symmetric, 2.5% of them are more than 2 standard deviations below the mean(so below 163cm) and 2.5% are more than two standard deviations above the mean.

2.5% of the students have heights less than 163cm.

Out of 1000

0.025*1000 = 25

25 is the answer

8 0
3 years ago
Read 2 more answers
Solve for n:<br> 6n − 2(4n + 7) + 4 = -2<br> A:-6<br> B:-4<br> C:4<br> D:6
almond37 [142]

Answer:

B

Step-by-step explanation:

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6n - 8n - 14 + 2 = -2 then you collect the like terms

6n - 8n= -2 + 14 - 4 then add and subtract and divide by the coefficient

-2n= 12 - 4

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= n = 8 ÷ -2

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5 0
3 years ago
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Fynjy0 [20]

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Step-by-step explanation:

Add Vikki’s and Chris’s videos (131+80=211)

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That will give you the average videos other couples rent

3 0
3 years ago
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So just read yhe picture please ​
const2013 [10]

The correct answer is B). 6

Radius of inscribed circle of triangle HJK is 6 unit

Step-by-step explanation:

As shown in figure,

The triangle HJK has In-circle or inscribed circle of radius PL(or PM or PN)

Since, PL and PM is radius of same in-circle,

PL = PM

Given that PL=3x+4 and PM =6x-14

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Thus, The correct answer is B). 6

6 0
2 years ago
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