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miss Akunina [59]
3 years ago
14

Help me with number 7 for 10 points!!!

Mathematics
2 answers:
vodka [1.7K]3 years ago
5 0
Mode=87 
Mean=77.5 
Median=84 
range =54
Ket [755]3 years ago
3 0
Remember this rhyme:

Hey Diddle Diddle, the medians the middle:

(Answer for your question: Median is 80%)

You add and divide for the Mean: 

( Answer for your question: Mean is 93)

The mode is the one that appears the most:

( Answer for your question: Mode is 87%)

And the range is the difference between.:

( Answer for your question: Range is 54.)

I hope this helps! :)
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Which of the following is a term, variable, and expression? <br><br> a.21<br> b.ab<br> c.5x2<br> d.h
Annette [7]
The answer is B. A term is a group of numbers and/or variables connected by multiplication. A and b are both variables and it is an expression because there is no equal sign.
8 0
4 years ago
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F(x) = -x^2 + 6x + 4 find f(-7)
mylen [45]

Answer:

11

Step-by-step explanation:

-(-7)^2 + (6*-7) + 4

7^2 + (-42) + 4

49 - 42 + 4 = 11

6 0
3 years ago
4. An English-speaking tourist visits a country in which 30% of the population speaks English. He needs to ask someone direction
12345 [234]

Answer:

a) 30%

b) 75.99%

Step-by-step explanation:

a) The probability that one random person will be able to speak English is equal to the percent of the population that speaks English. This is because, in the country, (number of favorable outcomes)/(number of total outcomes) = 30% = 0.3 = 3/10

b) The probability that at least one person speaks English is equal to 1 - (probability that none of them speak English). Of the 4 people, if N represents them not speaking English and Y represents them speaking English, here are a few possiblities:

NNNN

NYYY

NNYY

NNNY

YNNN

and so on. However, there is only one possibility where none of them speak  English, and the opposite of "none" is "at least one". So, the probability thsat none of them speak English is P(A and B and C and D) = P(A)*P(B)*P(C)*P(D), where P(A) represents the probability that the first person doesn't speak English and so on. The probability that the first person doesn't speak  English = 1 - (probability that the first person speaks English) = 1 - 30% = 0.7. Therefore, the probability that all of them don't speak English is 0.7^4 = 0.2401 and the probability that at least 1 of them speak English is 1- 0.2401 .= 0.7599 = 75.99%

4 0
2 years ago
In the figure below, △ A B C ∼△ D E F . BX and EY are altitudes of each triangle. Find the measure of EY to the nearest tenth.
Svetllana [295]

Answer:

EY≅ 5.33 cm (nearest to tenth)

Step-by-step explanation:

Two triangles are said to be similar to each other if they have the same shape

(not necessarily the same size) and their corresponding sides are in

proportion

Given that,

AB = 12

DE = 8

BX = 8

ΔABC ∼ ΔDEF means that

  1. ∠A ∼= ∠D, ∠B ∼=∠E and ∠C ∼= ∠F.
  2. Further more, their corresponding sides are in proportion.

So,

12/8 = 8/EY

(by doing cross multiplication)

12EY = 8 × 8

12EY = 64

EY = 64 / 12

EY= 5.3333

EY≅ 5.33 cm (nearest to tenth)

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3 years ago
My experrience to vollyball​
Andrew [12]

Answer:

My Volleyball season experience

As I had been getting ready for my second year of Volleyball tryouts my heart was pumping so fast in my chest I honestly thought I had been having a heart attack. Tomorrow was going to be the first day of tryouts and I was so excited yet nervous. Annika(my best friend) and I were practicing with our Volleyballs outside of her house. We were doing most of the drills we had remembered from the season before. After a couple of hours we decided we should stop before we pull a muscle or injury our bodies and rest up for tomorrow. My mother had cooked me up a grilled cheese sandwich with tomato soup, my absolute favorite meal ever, to get me ecstatic for tryouts and to settle my butterflies. Once I finished my delicious meal and proceed to get ready for bed, Annika and I called each other and talked for a while about what we were going to do tomorrow and how we hoped we would get on the team again. I quickly dozed off shortly after we hung up.

4 0
3 years ago
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