1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lozanna [386]
2 years ago
11

The table gives information about the speeds, in kilometres per hour, of 80 motorbikes as each pass under a bridge.

Mathematics
1 answer:
natka813 [3]2 years ago
6 0

The modal class is 70 - 80 and the mean speed is 66.4

<h3>How to determine the modal class?</h3>

The table of values is given as:

Speed    Frequency

40 - 50          10

50 - 60          16

60 - 70          19

70 - 80          23

80 - 90          12

The modal class is the class with the highest frequency

The class 70 - 80 has the highest frequency of 23

Hence, the modal class is 70 - 80

<h3>How to determine the mean?</h3>

Rewrite the frequency table to include the class midpoints

x             f

45          10

55          16

65          19

75          23

85          12

The estimate of the mean speed is then calculated as:

\bar x =\frac{\sum fx}{\sum f}

So, we have:

\bar x = \frac{45* 10 +  55 * 16 + 65 * 19 + 75 * 23 + 85 * 12}{80}

Evaluate

\bar x = 66.4

Hence, the mean speed is 66.4

Read more about mean and mode at:

brainly.com/question/14532771

#SPJ1

You might be interested in
Subtract 8 y^2 − 5 y + 7 from 2 y^2 + 7 y + 1 1 <br><br> The answer is: −6y ^2 +12y+4
lys-0071 [83]

Answer:

\large\boxed{-6y^2+12y+4}

Step-by-step explanation:

(2y^2+7y+11)-(8y^2-5y+7)\\\\=2y^2+7y+11-8y^2-(-5y)-7\\\\=2y^2+7y+11-8y^2+5y-7\qquad\text{combine like terms}\\\\=(2y^2-8y^2)+(7y+5y)+(11-7)\\\\=-6y^2+12y+4

4 0
3 years ago
What is the answer to 1552+452
Sergeeva-Olga [200]

Answer:

2004

Step-by-step explanation:

hope this is helpful

4 0
2 years ago
Read 2 more answers
a suite is on sale for $368, which is 36 percent less than the regular price. what is the regular price?
Temka [501]
The answer is 895 I think
8 0
3 years ago
Wesley is making a patio from stones of two sizes, 5 inches wide and 10 inches wide. He wants to begin and end his pattern with
Rom4ik [11]
The first stone will be 10-in wide
The last stone will be 10-in wide
The stones in the middle will be alternating between 5-in and 10-in stones, making a total of 15-in
Total width = 145-in
Width after placing first and last stones = 145 - 20 = 125-in
Number of 15-in patterns incorporated in 125-in:
125/15 = 8.33
Therefore, he will place 8 10-inch stones within and 9 5-inch stones within the patter. 
The total 10-inch stones used = 8 + 2 = 10
3 0
3 years ago
Read 2 more answers
Answer the following for Brainliest!!
attashe74 [19]
The answer will be C
5 0
3 years ago
Other questions:
  • Dan has twice as many stickers as Cam does. If Dan gives Cam 15 of his stickers he will still have 22 more than Cam. How many st
    10·2 answers
  • Stephanie has $152 in the bank. She withdraws $20. Then she deposits $84. Write an addition expression to represent this situati
    12·1 answer
  • 2. You have just signed an annual contract with TELUS for a cell phone. The base rate is $22 per month and $0.44 per minute. The
    13·1 answer
  • Jan and Bob run a family business. Jan put a sign up to take 25% off a $999.00 laptop computer. The laptop computer did not sell
    9·1 answer
  • Carl recorded the number of customers who visited his new store during the week:
    14·1 answer
  • Does a proportional relationship have a constant rate of change?
    5·1 answer
  • How many dimes equal the value of 6 quarters?
    9·2 answers
  • If a right triangle has two legs a=7 and b=4, what is the length of the hypotenuse
    9·1 answer
  • Oo what is 32 x 23 / 21
    6·2 answers
  • What is the probability of first drawing a red card then a king then a black card out of a deck of 52 cards rounded four decimal
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!