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3 years ago

15

Find the mean:31, 1, 12, 2, 21, 22, 1, 0, 31, 13

1 answer:

Bond [772]3 years ago

5 0

The mean is 13.4 because after I add the numbers in the set, the sum comes out to be 134. There are 10 numbers in the set, so you divide 134 by 10, which is 13.4 (134 <span>÷ 10 = 13.4). That is how you get the mean. It's "mean" to you because you 'gotta do a lot of work to get your final mean. </span>

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Math question help pls

tatyana61 [14]

The second one is right

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3 years ago

You roll a 6-sides die with faces number 1 through 6, and toss a coin. What is the probability of rolling a 2 or getting heads?

Vika [28.1K]

Answer:

2/3

Step-by-step explanation:

P1= rolling 2 = 1/6

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If f(x) = 4x + 21 and g(x) = 2x + 2 what is f[g(7)]

Nana76 [90]

Answer:

we conclude:

$f(g(7)) =85$

Step-by-step explanation:

Given

$f(x) = 4x + 21$

$g(x) = 2x + 2$

To determine

$f(g(7)) =?$

In order to determine f(g(7)), the first step we need to do is to determine g(7)

so substitute x = 7 in g(x) = 2x + 2

$g(x) = 2x + 2$

$g(7) = 2(7) + 2$

$g(7) = 14 + 2$

$g(7) = 16$

so now we have

$f(g(7)) =f(16)$

The next step to do is to substitute x = 16 in f(x) = 4x + 21

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so we have

$f(g(7)) =f(16)=85$

Therefore, we conclude:

$f(g(7)) =85$

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3 years ago

Read 2 more answers

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Answer:

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Step-by-step explanation:

7x/7=2/7

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3 years ago

A market research firm studied the waiting time to order drinks during breakfast time at drive-thru in two coffee shop chains. F

jeka57 [31]

Answer:

Yes

Step-by-step explanation:

Given that :

CHAIN A:

Sample size n1 = 30

Sample standard deviation of waiting time s1 = 21.2

CHAIN B:

Sample size, n2 = 28

Sample standard deviation of waiting time s2 = 31.4

Null hypothesis H0: s1 = s2

Alternative hypothesis H1: s1 < s2

Test statistic ; Ftest : s1² / s2²

Ftest = 21.2^2 / 31.4^2

= 0.4558399

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Since the pval < 0.05

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