Mathematics, 13.07.2019 16:10 louiecampos

Jason has 75 feet of wallpaper border. he wants to put up a wallpaper border around his rectangular bedroom that measures 12 feet by 14 feet. he multiplies 12 x 14 = 168 to get an exact answer of how much border he needs. he concludes that he does not have enough border for the whole job. 1. tell how you can critique jason’s reasoning. 2. critique jason’s reasoning 3. jason uses an overestimate to decide how many rolls of wallpaper he needs for another’s room. explain why his reasoning to use an overestimate does or does not make sense

Answers: 1

Show answers

Answers

Let's summarize the facts:

the tape is 75 feet long

the bedroom is 12 feet by 14 feet.

1. Tell how you can critique Jason’s reasoning.

If you want to Critique Jason's reasoning, you could a) ask yourself the same questions that Jason did and see if you would come with the same answers and used the same analysis or b) analyse Jason's answer to see if he did a mistake or missed an important detail and made a thought mistake

2. Critique Jason’s reasoning

I will use the option b from above:
?
Jason first multiplied 12 x 14 = 168. This multiplication is correct, but what did he get? He needed to get the perimeter of the bedroom because it was only the wallpaper border, not the wallpaper itself - so getting the perimeter was needed, but this we get by the formula ( 2* *(length+width), not length* width - as Jason did.
So Jason made a mistake here! his actual answer should be 2*(12+14)=2*26=52, so the tape of 75 feet would have been enough!

3. Jason uses an overestimate to decide how many rolls of wallpaper he needs for another’s room. Explain why his reasoning to use an overestimate does or does not make sense

Using an overestimate is often a good idea- in case some of the tape gets damaged, he will have some left. However, since his calculations are wrong by a lot (he multiplies rather than adds and multiplies by 2), his overestimate will be a lot higher than would be practical - he would be left with a lot of leftovers and spend too much money. So his reasoning does not make sense

Answer from: Quest

the sum of all the angles in a triangle are equal to 180

so you can add the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

Answer from: Quest

The reporter forgot to multiply the decimal by 100, making it 25%

Another question on Mathematics

Mathematics, 21.06.2019 20:30

Wrote and expression for the difference of p and 4

Answers: 1

Answer

Mathematics, 21.06.2019 20:30

A. plot the data for the functions f(x) and g(x) on a grid and connect the points. x -2 -1 0 1 2 f(x) 1/9 1/3 1 3 9 x -2 -1 0 1 2 g(x) -4 -2 0 2 4 b. which function could be described as exponential and which as linear? explain. c. if the functions continue with the same pattern, will the function values ever be equal? if so, give estimates for the value of x that will make the function values equals. if not, explain why the function values will never be equal.

Answers: 3

Answer

Mathematics, 21.06.2019 20:30

Laura read 1/8 of a comic book in 2 days. she reads the same number of pages every day. what part of the book does she read in a week

Answers: 1

Answer

Mathematics, 21.06.2019 21:00

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

Answers: 2

Answer

You know the right answer?

Jason has 75 feet of wallpaper border. he wants to put up a wallpaper border around his rectangular...