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
Alborosie
2 years ago
13

At King Kong High School, the average weight of senior boys is 168 lbs. with a standard deviation of 7 lbs. The average weight f

or senior girls is 117 lbs. with a standard deviation of 5 lbs. Suppose a new distribution is created by adding the boys' weights and the girls' weights together. Assuming that the weights for boys and girls are independent, which of the following is true?
I. The mean of this new distribution is 168 + 117.

II. The standard deviation of this new distribution is 5+ 7.

III. The variance of this new distribution is 52 + 72

A) I only

B) II only

C) I and II only

D) I and III only

E) I, II, and III
Mathematics
1 answer:
finlep [7]2 years ago
8 0

Answer:

1 and 2 only

Step-by-step explanation:

You might be interested in
The expression 16x2 + 4x + 125 represents the height, in feet, of a rock, x seconds after being thrown from a cliff. What does t
xeze [42]

The motion of the rock thrown from the cliff which goes downwards due to

the gravitational force, is a free fall motion.

  • 125 represents; <u>A. The initial height of the rock</u>.

Reasons:

The given function that represents the height of the of the rock in feet <em>x</em> seconds after being thrown is; f(x) = 16·x² + 4·x + 125

At the initial height before being thrown from the cliff, we have;

The time, x = 0

The initial height is therefore;

The initial height f(0) = 16 × (0)² + 4 × (0) + 125 = 125

125 represents <u>A. The initial height of the rock</u>

Learn more about motion under gravity here:

brainly.com/question/7596138

4 0
2 years ago
What is the quotient of 8.55 ÷ 1.5?
Katarina [22]

Answer:5.7

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Use a calculator ti find the values of the inverse trigonometric functions. round to the nearest degree.
Tanzania [10]

Answer:

wass the problem use the calc

Step-by-step explanation:

the 2nd function is ur bestie

3 0
3 years ago
For my homework i dont understand this: the sale price on an item is $160 after a 20% discount.what is the origonal price of the
mr_godi [17]
The original price is $200 because if you did 200 * 0.2, it would equal $160 which is the discounted price.
5 0
3 years ago
Help Asap! I have 30 minutes! 30 Points!
Vladimir79 [104]
(2x - 5) (5x - 10)
Use FOIL
10x² - 20x - 25x + 50

10x²  - 45x + 50
 

5( 2x² - 9x + 10)

     2x           -5 
      x             -2

5(2x - 5)(x -2)

make each equal to 0
2x - 5 = 0
x - 2 = 0

2x - 5 = 0                        x - 2 = 0
2x - 5 (+5) = 0                x - 2 (+2) = 0 (+2)
2x = 5                             x  = 2
x = 5/2

x = 5/2 , 2

hope this helps
6 0
3 years ago
Read 2 more answers
Other questions:
  • $9500 is invested part of it at 12% and part of it at 9%, for a certain year the total yield is $1032.00. How much was invest at
    14·1 answer
  • What is one quarter of 24
    11·2 answers
  • (02.01)<br> Solve for x: 3x - 5 = 2x + 6. (1 point)<br> a<br> -1<br> d<br> -11
    10·1 answer
  • What is 4/5 in simplest form
    6·2 answers
  • Write the equation of the line in​ slope-intercept form that passes through the points​ (-12, -6) and​ (8, 9).
    6·1 answer
  • If a scale drawing is 0.75 inches and the original drawing is 1.25 inches what is the scale factor
    10·1 answer
  • It took 3 yards of gauze dressing to wrap the patient's arm. How many inches of gauze dressing was used?
    6·1 answer
  • What type of question can be solved using Cramer's rule?<br>​
    8·1 answer
  • Min spends this amount of money. He buys a pen for $2 and an ink cartridge that is on sale for $10 off the regular price of $35.
    9·2 answers
  • Neil will pay 1/3 of a restaurant bill that is $72 including tax he decides to tip 20% on the amount he pays for the bill what i
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!