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igor_vitrenko [27]

3 years ago

15

24% of the books on David's shelf are mysteries. There are 36 mysteries on the shelf.

1 answer:

vesna_86 [32]3 years ago

5 0

$\frac{24}{100} = \frac{36}{x} \\ x = \frac{36 \times 100}{24} = \frac{3600}{24} = 150$
there are 150 books on the shelf

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What is the interquartile range of 77 88 92 81 86 84 86 83 and how do you get it thx plz help

puteri [66]

To find the IQR you first need to write it in numerical order

77, 81, 83, 84, 86, 86, 88, 92

IQR is just Q3 - Q1

Q1 is the middle of the first have, since it has an even set of 4 numbers in the first half you need to take the average of the two middle ones.. which is 82

Q3 done the same process would be 87.

87 - 82 = 5

IQR = 5

6 0

3 years ago

Draw the graphs of the equations x – y = 1 and 2x + y = 8. Shade the area bounded by these two lines and y-axis. Also, determine

NikAS [45]

Answer:

Using Geometry to answer the question would be the simplest:

Step-by-step explanation:

Remembering the formula for the area of a triangle which is $A=\frac12bh$ . One can then tackle the question by doing the following:

Step 1 Find the y-intercepts

The y-intercepts are found by substituting in $x=0$ .

Which gives you this when you plug it into both equations:

$-y=1\\y=-1\\y=8$

So the y-intercepts for the graphs are $(0,-1)\\$ , and $(0,8)$ respectively.

Now one has to use elimination to solve the problems by adding up the equations we get:

$x-y=1\\2x+y=8\\3x=9\\x=3$

Now to solve for the y component substitute:

$2(3)+y=8\\y=2$

Therefore, the graphs intersect at the following:

$(3,2)$

Now we have our triangle which is accompanied by the graph.

now to solve it we must figure out how long the base is:

$b=8-(-1)\\b=9$

The height must also be accounted for which is the following:

$h=3$

Now the formula can be used:

$A=\frac12bh=\frac12(9)(3)=\frac{27}2\ \text{units}^2$

7 0

3 years ago

Read 2 more answers

An assistant at an animal shelter wants to know the typical age of dogs admitted to the shelter. the shelter has admitted 353 do

Nikitich [7]

Step-by-step explanation:

hope you can understand

5 0

2 years ago

Ricky withdrew a total of $175 from his bank account over 5 days. He withdrew the same amount each day. By how much did the amou

kifflom [539]

Answer:

$35

Step-by-step explanation:

175/5 = 35

have a nice day! (maybe get this double checked in case I did it wrong :D)

8 0

2 years ago

1/2x+y=10<br> solving literal equation

hram777 [196]

Step-by-step explanation:

<u>1</u><u> </u> x-y = 10

2

multiply by 2

2* (<u>1</u> x+y) =10

2

x+y=20

5 0

3 years ago