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
Helen [10]
3 years ago
11

A sample of 12 measurements has a mean of 8.5 and a sample of 20 measurements has a mean of 7.5. Find the mean of all 32 measure

ments.
Mathematics
1 answer:
nalin [4]3 years ago
6 0
Multiply 8.5 by 12, multiply 7.5 by 20, add them together to get 252, then divide that by 32 to get 7.875. 7.875 is the mean of all 32 measurements
You might be interested in
Ali has a quarters, d dimes, and n nickels. He gets four more quarters. He gives away three
viva [34]

Answer:

(q + 4) + (d - 3) + n

Step-by-step explanation:

You have to add all of them.

You have to add q, d, and n.

so q + d + n

and then you add four more q's so

(q + 4) + d + n

and then you lost 3 dimes so

(q + 4) + (d - 3) + n

and nothing happened to n so that is the answer.

4 0
3 years ago
What is 9/11=?/22 if it was a whole number?
vampirchik [111]
?=x\\\\\frac{9}{11}=\frac{x}{22}\ \ \ |it's\ a\ proportion\ \ \ |cross\ multiply\\\\11\cdot x=9\cdot22\ \ \ \ |divide\ both\ sides\ by\ 11\\\\x=\frac{9\cdot\not22^2}{\not11_1}\\\\x=\frac{9\cdot2}{1}\\\\\boxed{x=18}

6 0
4 years ago
Read 2 more answers
In the diagram the radius of the outer circle is 2x cm and the radius of the inner circle is 6 cm. The area of the shaded region
stich3 [128]

let's find the area of the outer circle and the inside circle

the inside's circle area

A= π x 6²=36π

the outer's

A' = π x 4x²= 4πx²

A'-A=4πx²- 36π=160πcm² equivalent to x²- 9=40, so x²=49 implies x =sqrt(49)=7, x=7.

5 0
3 years ago
Help me solve this plssss
weeeeeb [17]

Answer:

UV = 40

UY = 40

Step-by-step explanation:

The sides in YXWVU are the same as the ones in GHIJK times 10.

UV = KJ*10

UY = KG*10

7 0
3 years ago
Read 2 more answers
If 6 is a factor of a number, what other numbers must be factors of<br> the number?
zysi [14]

Answer:

2 and 3

Step-by-step explanation:

6 = 2 × 3, so if a number is divisible by 6, it is also divisible by 2 and 3.

8 0
3 years ago
Other questions:
  • The product of two numbers is 65.Their difference is 8.Find these numbers.
    14·1 answer
  • Manuela solved the equation below. 2(×+2)=×-4 What is the solution to Manuela’s equation?
    7·2 answers
  • Please help asap.... lots of points and brainliest….
    9·1 answer
  • a cheetah can run at a rate of 105,600 yards per hour. Find the number of miles the cheetah could run in 5 minutes.
    15·2 answers
  • In your notebook, draw several perpendicular lines. What kind of angles are formed?
    8·2 answers
  • 1. Devin is making a candle by pouring melted wax into a mold in the shape of a square pyramid. Each side of the base of the pyr
    11·2 answers
  • I need help pls and than you
    5·2 answers
  • Solve for x.<br> 5(x-2)-x-5= -3
    12·1 answer
  • Which expression is equivalent to x² - 4x - 45?
    7·2 answers
  • state domain and range, intercepts, relative max and relative mins points and values, intervals of increase and decrease, interv
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!