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BartSMP [9]
2 years ago
11

.. Using a calculator, determine which is closest to V 19? Answer: b=4.3

Mathematics
1 answer:
Andrew [12]2 years ago
5 0

Answer:

?

Step-by-step explanation:

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The table shows information about the numbers of hours 30 children spent on their tablets one evening. a) find the class interva
Bogdan [553]

Answer:

a) 20<h≤30.

b) 26.17 hrs

Step-by-step explanation:

The missing table is shown in attachment.

Part a)

We need to find the class interval that contains the median.

The total frequency is

\sum \: f = 30

The median class corresponds to half

\frac{1}{2}  \sum \: f ^{th}  -  -  - value

That is the 15th value.

We start adding the frequency from the top obtain the least cumulative frequency greater or equal to 15.

2+8+9=19

This corresponds to the class interval 20<h≤30.

Adding from the bottom also gives the same result.

Therefore the median class is 20<h≤30.

b) Since this is a grouped data we use the midpoint to represent the class.

The median is given by :

\frac{\sum \: fx}{ \sum\: f}

=  \frac{5 \times 3 + 15\times 8 + 25 \times 9 + 35 \times 7 + 45 \times 4}{30}

=  \frac{785}{30}

= 26.17

8 0
3 years ago
Read 2 more answers
How would I change this to standard form. <br><img src="https://tex.z-dn.net/?f=y%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20x%20-%201"
Pie

Answer:

x - 2y = 2

Step-by-step explanation:

the equation of a line in standard form is

Ax + By = C ( A is a positive integer and A, B are integers )

given y = \frac{1}{2} x - 1

multiply through by 2 to eliminate the fraction

2y = x - 2 ( subtract 2y from both sides )

0 = x - 2y - 2 ( add 2 to both sides )

x - 2y = 2 ← in standard form


8 0
3 years ago
There is a number three times the number -6 is equal to 45 find the number
Oduvanchick [21]

Answer:

6+ 45 = 500 #!_ djdjbdkeknf

4 0
3 years ago
Read 2 more answers
What is the sum of 3 fifteens and 17 fifteens?
EleoNora [17]

well 3x15= 45 and 15x17= 255 so 45+255= 300
8 0
3 years ago
The graph of the function f(x) is shown below.
faust18 [17]
Remember, parenthaees are like < and > and brackets ar like ≤ and ≥

domain is how far the x values go
x is left to right

we see they go from -3 to 5, with a filled in dot at -3 and empty dot at 5
means include -3 but not including 5
so like -3≤x<5
or in interval notation
[-3,5) is the domain



range
highest to lowest y value

range is from y=3 to y=-1
we gots full dots so we use brackets
range is [-1,3]



Domain=[-3,5)
Range=[-1,3]


B. read above and understand it
5 0
3 years ago
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