MATHEMATICS HIGH SCHOOL

What is the multiplicative inverse of -0.4

Answers

Answer 1
Answer: It is -2.5 -- as you multiply them you'd get exactly positive 1.
Answer 2
Answer:

Answer:

0.4

Step-by-step explanation:

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from 5 employees at a company a group of 3 employees will be chosen to work on a project. how many different groups of 3 employees can be choosen?

Answers

The answer to the math question presented above would be 10. From 5 employees at a company a group of 3 employees will be chosen to work on a project, the number of different groups of 3 employees can be chosen is 10. You can have 10 different groups of threes in 5 employees.




A researcher calculates the expected value for the number of girls in three births. He gets a result of 1.5. He then rounds the result to 2, saying that it is not possible to get 1.5 girls when three babies are born. Is this reasoning correct? Explain.

Answers

yes his reasoning is correct because you can not cut a person in half. you can not be born with half of a body so you would have to round your result to the nearest whole number which in this case is 2 so he would technically be correct

Lori rode her bicycle 19.5 miles in 3 hours. Which gives the best estimate of how far Lori road in 1 hour?

Answers

Lori rode her bicycle 19.5 miles in 3 hours.
let's estimate how far Lori road in 1 hour.
=> 19.5 miles in 3 hours = 19.5 to be divided by 3 hours
=> 19.5 / 3 = 6.5 
Estimate
=> 20 / 3 / = 6.7

Answer:

6.7, i am trying to help but i am bad at math so if u get it wrong look at a pro answer

Step-by-step explanation:

The least-squares regression line is ________. a. the line that passes through the most data points.
b. the line that minimizes the vertical distances of the data points from the line.
c. the line such that half of the data points fall above the line and half fall below the line.
d. All of the choices are correct.

Answers

Answer:

a. the line that passes through the most data points.

Step-by-step explanation:

Regression analysis, is used to draw the line of‘ best fit’ through co-ordinates on a graph. The techniques used enable a mathematical equation of the straight line form y=mx+c to be deduced for a given set of co-ordinate values, the line being such that the sum of the deviations of the co-ordinate values from the line is a minimum, i.e.

The least-squares regression lines  is the line of best fit

Partition the model to prove that the following number sentence is true 2/5 + 4/10

Answers

Final answer:

In order to prove the sentence 2/5 + 4/10, a partitioned model could be used. Here, 2/5 equates to 4 out of 10 parts and 4/10 equates to 4 out of 10 parts. Adding these provides a total of 8 out of 10 parts, thereby proving the sentence is true.

Explanation:

To prove the number sentence 2/5 + 4/10 is true using a partitioned model, you need to start by understanding that fraction addition involves just combining the fractions. If you partitioned a model into 10 equal parts representing 1 whole, 2/5 would be 4 parts and 4/10 would be 4 parts. Adding these together 4parts (being 2/5) + 4parts (being 4/10) makes 8 parts. Since 1 whole is made up of 10 parts, 8 parts equate to 8/10 or 0.8. Therefore, 2/5 + 4/10 = 0.8 or 8/10 validating the sentence as true.

Learn more about Fraction Addition here:

brainly.com/question/34291287

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You measure a piece of rope and find its length to be 13 m. Find the percent error of this measurement. Round to the nearest hundredth.A. 0.15%

B. 0.92%

C. 3.85%

D. 0.38%

Answers

its either b or d are my best guesses

Answer:

c. 3.85

Step-by-step explanation:
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At a zoo, the lion pen has a ring-shaped sidewalk around it. The outer edge of the sidewalk is a circle with a radius of 11 m. The inner edge of the sidewalk is a circle with a radius of 9 m. Find the exact area of the larger circleFind the exact area of the smaller circle.Write an expression to find the exact area of the sidewalk (shaded portion).Find the approximate area of the sidewalk. Use 3.14 to approximate π. Answer:Find the exact area of the larger circle. Show your work. (1 point)A= N x 11 2 A = n? Find the exact area of the smaller circle. Show your work. (1 point)A= n 9 2 A=n?Write an expression to find the exact area of the sidewalk (shaded portion). Show your work. (2 points) 11 2 – 9 2 x nFind the approximate area of the sidewalk. Use 3.14 to approximate π. Show your work. (1 point) 11 2 x 3.14 – 9 2 x 3.14=