MATHEMATICS HIGH SCHOOL

What must be true about the slopes of two perpendicular lines, neither of which is vertical?

Answers

Answer 1
Answer: This is strange because in order for the lines to be perpendicular they must have one vertical and one horizontal. 

In this case I would say that the they have no slope.

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COLLEGE

Airline companies are interested in the consistency of the number of babies on each flight, so that they have adequate safety equipment. Suppose an airline conducts a survey. Over Thanksgiving weekend, it surveys 6 flights from Boston to Salt Lake City to determine the number of babies on the flights. It determines the amount of safety equipment needed by the result of that study. Select the things that were wrong with the way the survey was conducted. (Select all that apply.)

O The survey uses systematic sampling.

O Conducting the survey on a holiday weekend will not produce representative results.

O Choosing 6 flights represents a stratified sample.

O The survey was conducted using six similar flights.

O The survey would not be a true representation of the entire population of air travelers.

Answers

Answer:

-Conducting the survey on a holiday weekend will not produce representative results

-The survey was conducted using six similar flights

-The survey would not be a true representation of the entire population of air travelers

Step-by-step explanation:

First of all, the sampling method that was used in this survey/study was a convenience sampling, were they just used the data that was readily available, which in this case were the 6 flights from Boston to Salt Lake City.

This sampling method is useful for pilot studies and for identifying tendencies, however, the obtained sample is not representative of the population, and because there is no criteria to organize the sample, (for example there was no fight with a different route taking into account) it is impossible to obtain statistical results that are precise.

And besides that, the fact that the survey was carried out over Thanksgiving weekend is also a factor that can directly affect the results, so it needs to be taken into account as a variable, which in this study was not.

HIGH SCHOOL

What can you tell about a functional relationship from its graph?

Answers

Answer:


Step-by-step explanation:

If the relationship is a function, then drawing vertical lines thru the graph results in only one intersection per x-value with the graph.  If a vertical line intersects the graph 2 or more times, the relationship is not a function.

HIGH SCHOOL

PLEASE HELP!!!!!!!!!! Eighth-grade students with a 3.0 GPA or higher were polled to determine how long students study each day.

a. Students with lower grades are less likely to study as long.

c. The sampling method is systematic.

b. Only eighth grade students were asked.

d. There is no bias.



Identify the possible bias

Answers

The answer is b. Only eighth grade students were asked. 
MIDDLE SCHOOL

What is the answer to 2/3 ( c-18)= 7, please show the steps

Answers

(2/3)*(c-18)=7 (Multiply terms on both sides of equation by 3)

2(c-18)=21

2c-36=21

2c=57

c=57/2

c=28.5

2 / 3 ( c - 18 ) = 17 
multiplying 2 / 3 to the value in bracket
2 c / 3 - 36 / 3 = 7 
adding 36/3 on other side
2 c / 3 = 7 + 36 / 3 
by taking L.C.M
2 c / 3 = 21 /3 + 36 / 3
2c / 3 = 21 + 36 / 3
2 c / 3 = 57 /3 
multiplying 3 on other side
2 c= 57 / 3 ×3
3 will be canceled
2c = 57
dividing 2 on other side
c = 57 / 2
c = 28.5 answer...
MIDDLE SCHOOL

A baseball player had 4 hits in 8 games. At this rate, how many hits will the baseball player have in the next 28 games?

Answers

The number of hits will the baseball player have in the next 28 games will be 14.

What is an expression?

Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that a baseball player had 4 hits in 8 games. At this rate the number of hits in 28 games will be calculated as below:-

8 games = 4 hits

1 game = 4 / 8 hits

1 game = 1 / 2 hits

28 games = 28 / 2 hits

28 games = 14 hits

Therefore, the number of hits will the baseball player have in the next 28 games will be 14.

To know  more about an expression follow

brainly.com/question/20323470

#SPJ2

Answer:

14

Step-by-step explanation:

COLLEGE

In a study of government financial aid for college​ students, it becomes necessary to estimate the percentage of​ full-time college students who earn a​ bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a0.04margin of error and use a confidence level of95​%.Assume that nothing is known about the percentage to be estimated.nequals=nothing​(Round up to the nearest​ integer.)

Answers

Answer: 601

Step-by-step explanation:

When the prior estimate of the population proportion is unavailable , then the formula to find the sample size is given by :-

, where E = margin of error

and z* = Critical z-value associated with the confidence level.

As per given , we have

The prior percentage of​ full-time college students who earn a​ bachelor's degree in four years or less is not given.

E= 0.04

We know that the critical value for 95% confidence level = z*= 1.960

Then , the required sample size is given by :-

 

Hence, the required sample size is 601.

MIDDLE SCHOOL

99 points PLEASE HELP FAST ...A museum surveyed three groups of 5 members to find out how many times the members visited the zoo in the past year. The table shows the results of the three samples. Survey Visits to the Museum
Group 1 {4, 10, 6, 3, 8}
Group 2 {3, 1, 2, 1, 2}
Group 3 {7, 9, 3, 4, 7}

The sporting goods store has 1225 customers one weekend

Identify any surveys that are likely biased. Based on the unbiased surveys, estimate the mean number of visits per member in the past year.

Enter your answer in the box. Round to the nearest whole number

Answers

Hello!

I believe the answer is 6 visits.

I hope it helps!

*Hello there!*~

The answer is:

6.1

rounded the answer will be 6.

*Hopes this helps you!*~

Darlington~

HIGH SCHOOL

The first term of an arithmetic sequence is 2 and the fourth term is 11. Find the sum of the first 50 terms.

Answers

MIDDLE SCHOOL

Steve Woodmore broke the world record as the world’s fastest speaker, when he said 638 words per minute. Approximately how many words per second did Steve Woodmore speak when he broke the record? Round your answer to the nearest whole number.

Answers

638 words per minute is 638 word in 60 seconds or 10.634 words per second.
638 / 60 = 10.634 rounded to the nearest whole number is 11.
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