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
Please I really need this fast<br><br> Find the values of a and b in the kite below.
Marina CMI [18]

Answer:

a=5, b=15

Step-by-step explanation:

we know that

The figure MNLO is a Kite

so

LO=NO  and MN=LM

we have

LO=7a-14, NO=b+6

7a-14=b+6 -----> equation A

MN=b, LM=3a

b=3a -----> equation B

Solve the system of equations by substitution

Substitute equation B in equation A and solve for a

7a-14=(3a)+6

7a-3a=6+14

4a=20

a=5

Find the value of b

b=3a ----> b=3(5)=15

therefore

a=5, b=15

5 0
3 years ago
(110×110×110×110)2=?
sveticcg [70]

Answer:

2.9282 × 10^8

Step-by-step explanation:

(110×110×110×110)2

(146410000)2

292820000

292820000  can be simplified to 2.9282 × 10^8.

Hope this helps.

7 0
3 years ago
. Select all the properties of a rectangle.
8090 [49]

Answer:

A, C, D

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Triangles 1 and 2 have the angle measures
lawyer [7]

Answer:

C

Step-by-step explanation:

Both triangles have three angles of the same value.

Remember that the angles in all triangles add up to 180°.

Let's use that to find out the unknown angles.

For the first triangle:

180 - 82 - 43 = 55°

55° is also in the second triangle.

Let's check with the second triangle:

180 - 82 - 55 = 43°

43° is also in the first triangle.

Therefore, both triangles are similar as the angles in both triangles are the same - 82°, 43° and 55°.

Hence, C.

7 0
3 years ago
The electrical charge on a metal plate is given
Katarina [22]

Answer:

after 10 seconds  the charge  is 1.624

Step-by-step explanation:

I think your question missed key information, allow me to add in and hope it will fit the orginal one.

The electrical charge on a metal plate is given  by the function below, where t is the time in  seconds. What is the charge after 10 seconds?

C (t) = 12e^{\frac{-t}{5} }

My answer:

Given the information:

C (t) = 12e^{\frac{-t}{5} }  

when t =10 we have:

C (10) = 12e^{\frac{-10}{5} }

<=>  C (10) = 12e^{-2}

<=>  C (10) = 12\frac{1}{e^{2} }

<=> C (10) = 12 * 0.1353

<=>  C (10) = 1.624

Hence, after 10 seconds  the charge  is 1.624

8 0
2 years ago
Other questions:
  • What is 55&gt; -7v +6 plzz help, this my homework
    5·1 answer
  • Can someone please help me?
    8·1 answer
  • What Info is required
    5·2 answers
  • Nilda has $25 in her savings account. She plans to save 6.50 per week from her salary. Iona has $50 in her account but can save
    14·1 answer
  • Substitute the values of x and y into the expression -3x2 + 2y2 + 5xy - 2y + 5x2 - 3y2. Match that value to one of the numbers.
    13·1 answer
  • A recipe calls for 1/2 teaspoon of crushed red pepper and 3/4 teaspoon of thyme leaves. What is the unit rate of teaspoons of cr
    10·1 answer
  • 38. BLIMP A blimp travels 300 miles in
    9·1 answer
  • Please help with question attached on picture.
    5·1 answer
  • 2/9 of the students are in sixth-grade
    14·2 answers
  • Simply the expression a = -3; b = 9<br> -7a + 4b<br><br> 46?<br> -15?<br> 15?<br> 57?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!