The table shows the time it took a group of students to complete a puzzle.
Time (t) in minutes
Frequency
5
2
10
9
15
20
WOO
25
a) Work out an estimate for the mean time it took the students.
Round your answer to 2 significant figures.
b) What fraction of the students finished in less than 20 minutes?
Answers
Answer:
a) The mean time it took the students, t ≈ 17.08 minutes
b) The fraction of the students that finished under 20 minutes is 2/3 of the students
Step-by-step explanation:
a) The mean of the frequency of grouped data is given as follows;
The given data arranged in tabular form is presented as follows;
[tex]\begin{array}{cccc}Time \, (t) \, in \, minutes & Midpoint, m & Frequency, f & Product \ m \cdot f \\5\leq t < 10 & 7.5 & 2 & 15 \\10\leq t < 15 & 12.5 & 9 & 112.5\\15\leq t < 20 & 17.5 & 5 & 87.5 \\20\leq t < 25 & 22.5 & 5 & 112.5 \\25 \leq t < 30 & 27.5 & 3 & 82.5 \\Sum & 87.5 & N = 24 & \Sigma (m\cdot f) = 410 \end{array}[/tex]
Therefore, the mean time it took the students = ∑(f·m)/N = 410/24 = [tex]17\frac{1}{12}[/tex]
The mean time it took the students, t ≈ 17.08 minutes
b) The number of the students that finished under 20 minutes = 2 + 9 + 5 = 16 students
The fraction of the students that finished under 20 minutes = 16/24 of the = 2/3 of the students.
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Step-by-step explanation:
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Step-by-step explanation:
Which of the following values of n will result in a true statement when
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Answer:
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Answer:
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Step-by-step explanation:
Solve for x.
(x + 5)(x + 4) = 9x + 141
Answers
Answer: x=11 or x=-11
Step-by-step explanation:
Answer:x=11 or x=-11
Step-by-step explanation: First, Use the FOIL method.
(x+5)(x+4)=9x+141
First: [tex]x^{2}[/tex]
Outer: 4x
Inner: 5x
Last: 5x4=20
Combine Like terms and write in standard form: [tex]x^{2}[/tex]+9x+20
Set up new equation:[tex]x^{2}[/tex]+9x+20=9x+141
Subtract 9x from both sides: [tex]x^{2}[/tex]+20=141
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Brady needs to cut a piece of scrapbook paper
12 centimeters long. He cuts pieces of the following
lengths. Which cut results in a percent error of 15%?
Select all that apply.
Answers
Answer:
Option A and Option C
Step-by-step explanation:
If we know that we have to cut a peice of paper 12 centemiters long, that means a 15% error would be cutting out one of the following lengths....
12 - 12(0.15) = 10.2 cm
or
12 + 12(0.15) = 13.8cm
So from this, we see that the answers are Option A and Option C
~Help, please-~
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Also out of all these boys which one do you think is the [tex]cutest[/tex]?
1. Katsuki Bakugou
2. Eijiro Kirishima
3. Izuku Midoriya
4. Denki Kaminari
5. Tenya Ida
6. Yuga Aoyama
7. Mashirao Ojiro
8. Koji Koda
9. Rikido Sato
10. Mezo Shoji
11. Hanta Sero
12. Fumikage Tokoyami
13. Shoto Todoroki
14. Minoru Mineta
15. Tamaki Amajiki
Answers
Answer:
never heard of them
and the answer is choice B.
Step-by-step explanation:
alternate exterior angles have the same measure
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x
2
5
8
11
14
17
20
y
1
3
7
13
21
31
43
answer soon please ty!!!
Answers
Answer:
no real numbers
Step-by-step explanation:
Find the perimeter in simplest form and explain your work
Answers
9514 1404 393
Answer:
7 1/8 yd
Step-by-step explanation:
The perimeter is the sum of the three side lengths. They are all the same, so we can use multiplication to find their sum.
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P = 7 1/8 yd
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57/8 yards is the right answer.The school collected money for sweatshirts. If 75 students bought sweatshirts and the total cost was $1,260, how much did each student pay?
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Answer:
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Step-by-step explanation:
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Answer:
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Evaluate the function f(x) = 3x-5 when x= -3
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PLEASE HELP QUICK
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n = 8
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Answers
Answer:
It is 6 and 2/3
Step-by-step explanation:
Hope this helps
Answer:
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Step-by-step explanation:
Credits to the person above :)
are behind on your classes?
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Answer:
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Step-by-step explanation:
If f(x) = 5 + 4(x - 4)?,
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Answers
Answer:
Let's solve for f.
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Answers
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Answers
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Answers
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Step-by-step explanation:
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Answer:
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Answers
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Answers
Answer:
$200 dollars my friend.
Step-by-step explanation:
Hope I helped!
The solution is Option G.
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What is an Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
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Substituting the values in the equation , we get
A = ( 2/3 ) x 15% x 2000 be equation (1)
On simplifying the equation , we get
A = ( 2/3 ) x ( 15/100 ) x 2000
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Therefore , the value of A is $ 200
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Answers
Answer:
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In 1 day, there are 24 hours. 24 multiplied by 1/6 is 4. I know this because 24 x 1/6 = 24/1 x 1/6 = 24/6 = 4/1 = 4.
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I would appreciate brainliest.
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Step-by-step explanation:
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Answer:
y≤2x+1
Step-by-step explanation:
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-8x+4y<=4
-8x+4y≤4
Add 8x to both sides
4y≤8x+4
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This is 100% correct ask me if you have more questions hope this helps.
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3(6+5)
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3(9+5)
6(3+2)
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Answers
The expression that shows 18 + 15 as a product of two factors is 3(6 + 5)
How to rewrite the expression as a product?The expression is given as:
18 + 15
Factor out 3 from the expression
18 + 15 = 3 * (6 + 5)
Hence, the expression that shows 18 + 15 as a product of two factors is 3(6 + 5)
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find the value of the the missing angle in grades in each of the following figures.
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Angle on a straight line = 180°
Given Angles :
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Find the difference: 5.68 -
- 2.15 - (-1.34) = *
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Answer:
THE ANSWER FOR THIS QUESTION IS 9.17
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Answer:
Step-by-step explanation:
M=slope
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GIVING 50 POINTS AND BRAINALIST FOR DA RIGHT ANSWER >:>Jordan has 300 pieces of candy. He gives Adrian ¼ pieces, 10% was given to Darien and he gave his little brother 25 pieces. Explain in writing (typing) how to find the number of pieces each person received then explain in writing (typing) how to find the number of pieces Jordan has left. (Remember to write 5 or more complete sentences)
Answers
Answer:
170 pieces leftStep-by-step explanation:
There are total 300 pieces of candy.
Adrian gets 1/4 of total
Multiply the total number by 1/4, to find the number Adrian gets:
300*1/4 = 75Darien gets 10% of total.
10% is equal to 10/100 = 1/10. Multiply 300 by 1/10 to get the number Darien gets:
300*1/10 = 30The little brother gets 25 pieces.
Number of pieces Jordan has given:
75 + 30 + 25 = 130Number of pieces left:
300 - 130 = 170 pieces