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3 years ago

In a class of students, the following data table summarizes how many students play

Mathematics

2 answers:

antiseptic1488 [7]3 years ago

7 0

Answer:

19/28

Step-by-step explanation:

People who count: 4 + 2 + 13 = 19

Total amount of pplz: 19 + 9 = 28

prisoha [69]3 years ago

7 0

Answer:

15/28

Step-by-step explanation:

The total amount of students in the class is 28. This will be useful for later.

From this table, we can see that 2 people play sports alone and 13 play an instrument alone. Since it says the number of students that play a sport or an instrument, this means that the top left box is not counted. This leaves you with an answer of 15/28.

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The difference of twice a number and 3 is -21 translated

Westkost [7]

Answer:

2x-3=-21.

2x=-21+3.

2x=-18.

x=-18/2.

x= -9.

7 0

4 years ago

Read 2 more answers

2x + 15 = 82 – 9<br> What is the value of x that makes the equation true

scZoUnD [109]

Answer:

Step-by-step explanation:

Here you go mate

Step 1

2x+15=82-9 Equation/Question

Step 2

2x+15=82-9 Simplify

2x+15=73

Step 3

2x+15=73 Subtract

2x=58

Step 4

2x=58 Divide by 2

answer

x=29

6 0

3 years ago

The mean incubation time of fertilized eggs is 19 days. Suppose the incubation times are approximately normally distributed with

kotykmax [81]

Answer:

Step-by-step explanation:

Since the incubation times are approximately normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - µ)/σ

Where

x = incubation times of fertilized eggs in days

µ = mean incubation time

σ = standard deviation

From the information given,

µ = 19 days

σ = 1 day

a) For the 20th percentile for incubation times, it means that 20% of the incubation times are below or even equal to 19 days(on the left side). We would determine the z score corresponding to 20%(20/100 = 0.2)

Looking at the normal distribution table, the z score corresponding to the probability value is - 0.84

Therefore,

- 0.84 = (x - 19)/1

x = - 0.84 + 19 = 18.16

b) for the incubation times that make up the middle 97% of fertilized eggs, the probability is 97% that the incubation times lie below and above 19 days. Thus, we would determine 2 z values. From the normal distribution table, the two z values corresponding to 0.97 are

1.89 and - 1.89

For z = 1.89,

1.89 = (x - 19)/1

x = 1.89 + 19 = 20.89 days

For z = - 1.89,

- 1.89 = (x - 19)/1

x = - 1.89 + 19 = 17.11 days

the incubation times that make up the middle 97% of fertilized eggs are

17.11 days and 20.89 days

6 0

3 years ago

Which expressions are equivalent to the given equation. Logarithmic form

iren2701 [21]

The expression that is equivalent to the given logarithm equation is log₄ 1 / 4 + log₄ x²

<h3>How to solve logarithm?</h3>

log₄ (1 / 4 x²)

Using logarithm law, the logarithm can be express as follows;

using logarithm law,

Therefore, the expression that is equivalent to the given logarithm equation is as follows:

using addition law for logarithm,

log₄ (1 / 4 x²) = log₄ 1 / 4 + log₄ x²

learn more on logarithm here: brainly.com/question/2428816

#SPJ1

6 0

3 years ago

The food service manager conducted a random survey of students to determine their preference for new lunch menu items. Which of

gogolik [260]

Answer:

<u>Inferences A, B and C are correct.</u>

Complete question, data and inferences:

Item Number of students

Pizza 6

Salad Bar 27

Pita Sandwiches 13

Burritos 24

The food service manager conducted a random survey of students to determine their preference for new lunch menu items. Which of these inferences can be drawn from the manager’s data? Select all that apply.

A. About twice as many students prefer salad bar as compared to pita sandwiches.

B. About three-fourths of students prefer either salad bar or burritos.

C. About half as many students prefer pita sandwiches as compared to burritos.

D. Burritos are the most preferred item.

E. Twice as many students prefer pizza as compared to pita sandwiches.

Source:

Question that can be found at quizizz dot com. We can't copy and paste the exact URL because brainly will block it.

Step-by-step explanation:

A. About twice as many students prefer salad bar as compared to pita sandwiches. True. Two times 13 is 26 and the number of students that prefer Salad Bar is 27.

B. About three-fourths of students prefer either salad bar or burritos. True. 51 students are the 73% (about three-fourths of the students surveyed) of the total students surveyed, 70.

C. About half as many students prefer pita sandwiches as compared to burritos. True. 13 is almost the half of 24.

D. Burritos are the most preferred item. False. Salad Bar is the most preferred item.

E. Twice as many students prefer pizza as compared to pita sandwiches. False. It's the opposite actually; twice as many students prefer pita sandwiches as compared to pizza.

4 0

3 years ago