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olga_2 [115]
2 years ago
7

Help with Questions 4 and 5! Will mark Brainliest for the best and accurate answers!

Mathematics
2 answers:
qaws [65]2 years ago
7 0

question 4 is A

question 5 is 43.6

question 5 showing work

how I would figure it out is 151-20 =131

then I would divide it by 3 for each day

_

131÷3=43.6

cestrela7 [59]2 years ago
4 0

Answer:

131÷3=43.6

Step-by-step explanation:

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Find the 9th term of the arithmetic sequence with a 10 and d= -1/2
VLD [36.1K]

a=10

d=-1/2

nth term=a+(n-1)d

10+(9-1)(-1/2)

10-4 =6

5 0
3 years ago
Assume that when adults with smartphones are randomly​ selected, 63​% use them in meetings or classes. If 7 adult smartphone
nlexa [21]

Answer:

5.78% probability that exactly 2 of them use their smartphones in meetings or classes.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they use their smarthphone in meetings or classes, or they do not. The probability of an adult using their smartphone on meetings or classes is independent of other adults. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

63% use them in meetings or classes.

This means that p = 0.63

7 adult smartphone users are randomly selected

This means that n = 7

Find the probability that exactly 2 of them use their smartphones in meetings or classes.

This is P(X = 2).

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 2) = C_{7,2}.(0.63)^{2}.(0.37)^{5} = 0.0578

5.78% probability that exactly 2 of them use their smartphones in meetings or classes.

8 0
3 years ago
What is the value of x?​
Otrada [13]

Answer:

Where is your question?

Step-by-step explanation:

6 0
3 years ago
PLEASE HELP WILL GIVE BRAINLY
schepotkina [342]

Answer:

.

Step-by-step explanation:

sorry I dont know this... I'm sorry

4 0
3 years ago
Read 2 more answers
Find the 18th term of the arithmetic sequence-<br><br> -2, -6, -10, -14
tresset_1 [31]

Answer:

-2, -6, -10, -14, -18, -22, -26, -30, -34, -38, -42, -46, -50, -54, -58, -62, -66, -70

Step-by-step explanation:

The answer is -70.

Brainliest please! Visit my church's website at fbcinterlaken.org to learn more about God! It would mean a lot if you could also subscribe to the You Tube channel as well! Thank you and have a nice day! :)

3 0
2 years ago
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