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
Klio2033 [76]
4 years ago
8

Find the mean of the data summarized in the given frequency distribution. The highway speeds (in mph) of a random sample of cars

are summarized in the frequency distribution below. Find the mean speed. Round your answer to one decimal place.

Mathematics
1 answer:
Murrr4er [49]4 years ago
3 0

Answer:

Mean speed is 55.7 mph.

Step-by-step explanation:

The provided frequency distribution is:

Speed Cars

30-39 4

40-49 19

50-59 50

60-69 15

70-79 12

The formula to compute the mean for the grouped data is:

\bar{X} =\frac{\sum(mf)}{\sum(f)}

Here, m is mid point and f is frequency.

The mean speed can be computed as:

Thus, the mean speed is 55.7 mph.

You might be interested in
Exercise 5.2<br>Which of the capital letters of the English alphabet are symmetrical?​
daser333 [38]

Answer:

The Capital letter of English alphabet that are symmetric are B,C,D,E,H,I,K,OX

Step-by-step explanation:

hope it helps

4 0
3 years ago
WILL GIVE BRAINLIEST!!!!! PLS HELP ASAP!!!! 100 POINTS!!!!!!
PSYCHO15rus [73]

Answer:

the linear function gives us the points

(0,3)

(4,0)

(8,-3)

find the equation

hm

find slope

(y2-y1)/(x2-x1)

for (0,3) and (4,0)

slope=(0-3)/(4-0)=-3/4

y=-3/4x+b

given

(0,3)

y=-3/4x+3

so sub -3/4x+3 for y in other equation

(-3/4x+3)^2+x^2=4

expand

9/2x^2-9/2x+9+x^2=4

11/2x^2-9/2x+9=4

times 2 both sides

11x^2-9x+18=8

minus 8 both sides

11x^2-9x+10=0

factor

or use quadratic formula

for

ax^2+bx+c=0

x=\frac{-b+/- \sqrt{b^2-4ac} }{2a}

2a

−b+/−

b

2

−4ac

11x^2-9x+10=0

x=\frac{-(-9)+/- \sqrt{(-9)^2-4(11)(10)} }{2(11)}

2(11)

−(−9)+/−

(−9)

2

−4(11)(10)

x=\frac{9+/- \sqrt{81-440} }{22}

22

9+/−

81−440

x=\frac{9+/- \sqrt{-359} }{22}

22

9+/−

−359

we see we have no real roots

there are no intersection points

#Carry on learning

#Correct me if I'm wrong

6 0
3 years ago
Find the value of x​
KATRIN_1 [288]

Answer:

Step-by-step explanation:

Here we have the length of the hypotenuse (16) and that of the vertical leg (11).  The cosine function inputs this data:

            adjacent side                11

sin x = -----------------------  =  ----------------  =  0.6875

              hypotenuse                 16

We find x using the arccos function:  arccos 0.6875 = 0.81 radians or

                                                                                          46.57 degrees

3 0
4 years ago
In circle "R" below, determine the length of arc AB if BR = 5 units.
riadik2000 [5.3K]
l=2 \pi r( \frac{degrees}{360} )

l=2 \pi × 5 × \frac{135}{360} = 11.78


4 0
4 years ago
Read 2 more answers
Use the distributive property to remove the parentheses. <br> I’m so bad at math so I need help :/
wlad13 [49]
Answer:

27x^5 + 30x^4

Step-by-step explanation:

Multiply 3x^3 out of (9x^2 + 10x)

Step 1. Multiply 3x^3 x 9x^2

Answer: 27x^5

Step 2. Multiply 3x^3 x 10x

Answer: 30x^4

“Add these two products together”

27x^5 + 30x^4

Hope this helps!

Love you.

- doomdabomb
5 0
3 years ago
Other questions:
  • What is 78.3 minus 54.6
    5·2 answers
  • CAN U GUYS HELP ME WITH THIS PROBLEM?
    7·1 answer
  • Which is the graph of the equation y = 3x – 5?
    5·1 answer
  • Hello, can somebody please help me with this word problem? Thanks.
    11·1 answer
  • Please help me please!!!​
    12·1 answer
  • Help plz on test 20 points
    13·1 answer
  • Find the integer pair that has the given product and sum. The product is – 26. The sum is – 11.​
    6·2 answers
  • What is the scale factor?
    8·2 answers
  • HELP PLEASE!!!!!!!!!!!
    10·2 answers
  • Factor the algebraic expression.<br> 18a+15
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!