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omeli [17]
2 years ago
8

Please help it’s easy I think

Mathematics
1 answer:
Nikitich [7]2 years ago
4 0

The frequency of revision times is given by the product of the frequency

density value and the class width.

Correct response:

  • The number of students are <u>72 students</u>

<h3>Methods of calculation using a histogram</h3>

The estimate of the number of students who revised for less than 45

minutes is given by the area, <em>A,</em> under the histogram to the left of the 45

minute mark as follows;

Frequency, f = Frequency density × Class width

Number of students = ∑f

Therefore;

A = 5 × 2 + 10 × 2.2 + 20 × 1.6 + 10 × 0.8 = 72

  • The number of students that revised for less than 45 minutes = <u>72 </u>students

Learn more about histograms here:

brainly.com/question/17139138

You might be interested in
If x=-6, which inequality is true ??<br>​
Gelneren [198K]

<em>Answer:</em>

The inequality that is true is -5 - 3x > 10.

<em>Step-by-step explanation:</em>

if x = -6

we can subtitution x to every inequality, so :

-5 - 3x > 10

-5 - 3(-6) > 10

-5 - (-18) > 10

-5 + 18 > 10

13 > 10 [true]

-3 - 5x < -14

-3 - 5(-6) < -14

-3 - (-30) < -14

-3 + 30 < -14

27 < -14 [false]

2 - x < -3

2 - (-6) < -3

2 + 6 < -3

8 < -3 [false]

So if x=-6, inequality true is -5 - 3x > 10.

<em>If this was helpful, please mark brainliest. Have a beautiful day. </em>

4 0
3 years ago
Find the distance between the points (–6, 7) and (0, 8).
Vladimir [108]

Answer:

\sqrt{37}

or 6.08276253

4 0
3 years ago
Line h contains the points (3,0) and (0,4). which point lies on a line that is perpendicular to line h and passes through point
Iteru [2.4K]
(3,0)(0,4)
slope = (4 - 0) / (0 - 3) = -4/3
A perpendicular line will have a negative reciprocal slope. So our perpendicular line has a slope of 3/4

y = mx + b
slope(m) = 3/4
(-6,-5)....x = -6 and y = -5
now sub into the formula and find b, the y int
-5 = 3/4(-6) + b
-5 = -18/4 + b
-5 + 18/4 = b
-20/4 + 18/4 = b
-2/4 = b
so ur perpendicular line is : y = 3/4x - 2/4....or 3x - 4y = 2

and ur point (6,4) lies on the perpendicular line <===


6 0
3 years ago
How would i do this problem? please help !
MrRa [10]

Answer:

hello. x =3

Step-by-step explanation:

- 8x =  - 24 \\   \frac{ - 8x}{ - 1}  =  \frac{ - 24}{ - 1}  \\ 8x = 24 \\  \frac{8x}{8}  =  \frac{24}{8} \\ x = 3

hope you u understand

6 0
1 year ago
Read 2 more answers
Which of the following disjunctions is false ?
notsponge [240]
A disjunction is false if both parts of the disjunction are false; otherwise, it is true
----------------------------------------------
Choice A

4-3=2 is false
6*3=9 is false

both parts are false, so overall the entire disjunction is false
----------------------------------------------
Choice B

5*6=30 is true
3+4=7 is true

Neither part is false, so overall the entire thing is true
----------------------------------------------
Choice C

8+3=11 is true
5*4=23 is false

While second piece is false, the overall disjunction is true. The first part (true) makes the whole thing true.
----------------------------------------------
Choice D

7+6=13 is true
5*2=10 is true

Neither part is false, so overall the entire thing is true
----------------------------------------------
----------------------------------------------
In summary, we have

A. False
B. True
C. True
D. True

Making choice A the only answer that is false. So choice A is the final answer

7 0
3 years ago
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