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3 years ago

How many groups of 12 day are in 1 week? Draw a tape diagram to show the relationship

Mathematics

2 answers:

Lesechka [4]3 years ago

6 0

About 60 because weeks because 12 days go in equally

horsena [70]3 years ago

5 0

60 weeks because 12 days is equal to that

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If A represents a vector two units in length directed due west, B represents a vector three units in length directed due north a

Ludmilka [50]

Answer:

Step-by-step explanation:

Given

Vector A has two units in length due to west i.e.

$\vec{A}=-2\hat{i}$

Vector B has one unit in length due to North i.e.

$\vec{B}=\hat{j}$

Also $A+B=C-D$

i.e. $C-D=-2\hat{i}+\hat{j}--------1$

also $2B-A=C+D$

i.e. $C+D=2\times \hat{j}+2\hat{i}------2$

From 1 and 2

$2C=3\hat{j}$

$C=1.5\hat{j}$

$D=2\hat{i}+0.5\hat{j}$

5 0

3 years ago

Katie has read 34% of a book. If she read 85 pages, does she have more than or fewer than 125 pages left to read? Explain

mestny [16]

Determine the percent of book she hasn't read.
percent = 100% - percent she has read
percent = 100% - 34%
percent = 66%
She hasn't read 66% of the book.

Find the amount of page she hasn't read.
page = $\dfrac{\text{percent hasn't read}}{\text{percent has read}} \times\ \text{page has read}$
page = $\dfrac{66\%}{34\%} \times\ 85$
page = $\dfrac{66}{34} \times\ 85$
page = $\dfrac{5,610}{85}$
page = 165

The number of page she hasn't read is 165. It's more than 125.

3 0

4 years ago

What is -3/11 as a decimal

Marianna [84]

It is possible to convert a fraction to a decimal in mathematics. First, -3/11 is a fraction. To convert a fraction which is -3/11, divide 3 by 11 which you get .272727... and you get the idea. The '27' repeats. Therefore, the answer would be -.27 with a <span>Vinculum symbol which is a horizontal line above the number to indicate its repeating. Also, don't forget to put a negative sign!</span>

6 0

3 years ago

What is the confidence interval estimate of the population mean percentage change in the price per share of stock during the fir

I am Lyosha [343]

Answer:

(-0.1059 ; - 0.0337)

Step-by-step explanation:

The data table is attached in the picture below:

These is a matched pair design ; which requires taking the difference of the two values for each sample :

The mean and standard deviation of the difference will be used to construct the confidence interval :

The mean of difference, dbar = Σx/n = - 0.0698

The standard deviation of difference, Sd ;

Sd = [√Σ(d - dbar)²/(n-1)] = 0.1054

n = sample size = 25

The confidence interval :

dbar ± [TCritical * Sd/√n]

Tcritical at 90% ; df = n -1 = 25 -1

Tcritical(90% , 24) = 1.1711

C.I = - 0.0698 ± (1.711 * 0.1054/√25)

C.I = - 0.0698 ± 0.0361

C.I = (-0.1059 ; - 0.0337)

5 0

3 years ago

Parallel and Perpendicular Lines

Elena L [17]

Answer:

neither; perpendicular; parallel; neither; neither

Step-by-step explanation:

parallel line is where the 2 slopes have same gradient and perpendicular means the two lines have a -1 slope when producted

Topic: coordinate geometry

If you like to venture further, feel free to check out my insta (learntionary). I'll be constantly posting math tips and notes! Thanks! (I'll be uploading tips on parallel and perpendicular lines soon today!)

6 0

3 years ago