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Lelu [443]
2 years ago
8

Grade 7 students were surveyed to determine how many hours a day they spent on various activities. The results are represented i

n the circle graph below. About how much time altogether was spent on homework and eating?
Can Someone Help me please
Mathematics
2 answers:
taurus [48]2 years ago
7 0

⚘Question:------

If a = 2, b = 3, c = 5, find the value of↴

.

⚘Answer:------

ㅤㅤㅤ1

⚘Explanation:------

ㅤㅤIf a = 2, b = 3, c = 5, find the value of ac/b²+1

ㅤㅤPut The Value of a, b and c in ac/b²+1 ↴-

ㅤㅤㅤㅤㅤㅤㅤㅤ⇢2×5/(3)²+1

ㅤㅤㅤㅤㅤㅤㅤㅤ⇢10/9+1

ㅤㅤㅤㅤㅤㅤㅤㅤ⇢10/10

ㅤㅤㅤㅤㅤㅤㅤㅤ⇢ㅤ1

ㅤㅤㅤㅤ⚘⚘➢So, Your Answer Was 1

Slav-nsk [51]2 years ago
4 0

Answer:

I don't see the circle graph

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For a binomial process, the probability of success is 40 percent and the number of trials is 5. Find the standard deviation.
Yakvenalex [24]

Answer:

Sd(X) =\sqrt{1.2}=1.095

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=5, p=0.4)

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

The mean for the binomial distribution is given by:

E(X) =np=5*0.4=2

And the variance is given by:

Var(X) = np(1-p) =5*0.4*(1-0.4)=1.2

And the deviation is just the square root of the variance so we got:

Sd(X) =\sqrt{1.2}=1.095

7 0
3 years ago
Dominique paid $15.50 to join an online music service.If she purchases 10 songs each month at a cost of $0.99 per song,what will
ozzi

Answer:

94.7

Step-by-step explanation:

15.50+10*0.99*8

4 0
3 years ago
The table shows a proportional relationship between the number of stars Roberto collects in a game and his total points. A row o
maks197457 [2]

Answer:

1) 20 stars; 30 points.

2) 28 stars, 42 points.

3) 38 stars, 57 points.

Step-by-step explanation:

<h3> The missing table is attached.</h3>

Let  be "x" the numbers of stars Roberto collects and "y" his total points.

The proportional relationship has this form:

y=kx

Where "k" is the constant of proportionality.

We can choose the point (8,12) from the table, where:

x=8\\y=12

Substituting these values into  y=kx and solving for "k", we get:

 12=k(8)\\\\\frac{12}{8}=k\\\\k=1.5

Knowing the value of "k", we determine that the  following Numbers of stars and the Total points could be used as the missing values in the table:

1) For x=20 :

y=(1.5)(20)=30

2) For x=28 :

y=(1.5)(28)=42

3) For x=38 :

y=(1.5)(38)=57

4 0
3 years ago
Read 2 more answers
Binh has to write an 8-page report. If he has written 3/4 of his report so far, how many pages has he written?
Eva8 [605]

Answer:

6 pages

Step-by-step explanation:

3/4 = 8 = 2 = 1/2 = 3/4 / 8 = 6

This is confusing to understand but that's how I solved it.

4 0
2 years ago
If 4 blocks weigh 28 ounces how many blocks weigh 70 ounces
Sloan [31]

Answer:

10 blocks.

Step-by-step explanation:

Find the unit rate.

\frac{28}{4}=\frac{7}{1}=\frac{70}{10}

Therefore, 10 blocks weigh 70 ounces.

3 0
3 years ago
Read 2 more answers
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