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2 years ago

20 points brainliest!!!!

Mathematics

2 answers:

maksim [4K]2 years ago

7 0

Answer:

c i think

Step-by-step explanation:

Ad libitum [116K]2 years ago

7 0

Answer:

Step-by-step explanation:

You might be interested in

Can someone please help me with this?

mash [69]

Answer:

see explanation

Step-by-step explanation:

∠c = ∠ a = 47° ( vertical angles )

∠c and ∠b form a straight angle and are supplementary, thus

∠c + ∠b = 180, that is

47 + ∠b = 180 ( subtract 47 from both sides )

∠b = 133°

∠d = ∠b = 133° ( vertical angles )

That is a = c = 47° and b = d = 133°

The sum of the 4 angles = 133° + 47° + 47° + 133° = 360°

360° is the sum of the angles round a point , hence answer is correct

3 0

2 years ago

Twenty percent of what number is 5?

Semenov [28]

Answer:

A. 25

Step-by-step explanation:

25 split into 5 groups, 5 in each of them.

There are 5 20's in 100 (the total)

25 = 5 + 5 + 5 + 5 + 5

I hope the explanation makes sense!

7 0

2 years ago

SEE QUESTION IN IMAGE

r-ruslan [8.4K]

d.30

Answer:

Solution given:

x. $\:\:\:$ f. $\:\:\:$ fx

13. $\:\:\:$ 15. $\:\:\:$ 195

14. $\:\:\:$ 42 $\:\:\:$ 588

15. $\:\:\:$ x. $\:\:\:$ 15x

16. $\:\:\:$ 10. $\:\:\:$ 160

17. $\:\:\:$ 3. $\:\:\:$ 51

. n=70+x. $\sum$ =994+15x

we have

mean=sum/n

14.44= $\bold{\frac{\sum}{n}}$

14.44= $\bold{\frac{994+15x}{70+x}}$

doing crisscrossed multiplication

(70+x)*14.44=994+15x

1010.8+14.44x=994+15x

15x-14.44x=1010.8-994

0.56x=16.8

x=16.8/0.56

x=30

8 0

2 years ago

Read 2 more answers

Giana lives in Milton. She bought a bus ticket to travel to her cousins house in Orlando. She gets on the bus in Mobile.The dist

anyanavicka [17]

To travel to Orlando is time=300/70=4.29 hours

x=hours traveller
Since there is 30 miles left in trip, the distance already traveled is 300-30=270

Set proportion
300/4.29=270/x
300x=(270)(4.29)
300x=1158.3
300/300x=1158.3/300
x≈3.86 hours ☆☆☆☆☆☆☆SOLUTION

4 0

3 years ago

A Regional College uses the SAT to admit students to the school. The university notices that a lot of students apply even though

Aliun [14]

Answer:

0.191 is the probability that a group of 12 randomly selected applicants would have a mean SAT score that is greater than 525 but below the current admission standard of 584.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 500

Standard Deviation, σ = 100

n = 12

We are given that the distribution of SAT score is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(greater than 525 but 584)

Standard error due to sampling =

$\displaystyle\frac{\sigma}{\sqrt{n}} = \frac{100}{\sqrt{12}}$

$P(525 < x < 584) = P(\displaystyle\frac{525 - 500}{\frac{100}{\sqrt{12}}} < z < \displaystyle\frac{584-500}{\frac{100}{\sqrt{12}}}) = P(0.866 < z < 2.909)\\\\= P(z \leq 2.909) - P(z < 0.866)\\= 0.998 - 0.807 = 0.191 = 19.1\%$

$P(525 < x < 584) = 19.1\%$

0.191 is the probability that a group of 12 randomly selected applicants would have a mean SAT score that is greater than 525 but below the current admission standard of 584.

3 0

2 years ago