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
tester [92]
3 years ago
8

The mean of 4 numbers is 21. calculate the sum of the 4 numbers

Mathematics
1 answer:
Ugo [173]3 years ago
8 0

Answer:

84

Step-by-step explanation:

The mean is calculated as

mean = \frac{sum}{count} , then

\frac{sum}{4} = 21 ( multiply both sides by 4 )

sum = 84

You might be interested in
latasha was born in New York, she moved to California and lived there twice as long as she lived in New York . then she moved to
Inga [223]
X - how long she has lived in New York;
2x - - how long she has lived in California;
x + 2x + 8 = 62 => 3x + 8 = 62 => 3x = 54 => x = 54 / 3 => x = 18 years.
6 0
4 years ago
A branch of mathematics that uses variables
san4es73 [151]
Quadratic expressions use variables and they are a branch of math
4 0
3 years ago
Read 2 more answers
If f(x) = 2x + 2 and g(x) = x2 - 1, find (f - g)(x).
Mars2501 [29]

Answer:

  -x∧2+2x+3

Step-by-step explanation:

(2x+2)-(x2-1)

2x+2-x2+1

-x2+2x+3

6 0
3 years ago
Read 2 more answers
1/3 of students at a school are boys. If there are 600 students, how many of them are girls?
Nadya [2.5K]

400

Explanation:

1/3 of 600 is 200. That represents the boys.

Subtract 200 from 600, you get 400. That represents everybody else in the sample size (in this case, girls).

7 0
2 years ago
Find the volume of a cone with a base diameter of 8 cm and a height of 6 cm.
Delvig [45]

The volume of a cone is equal to 13 times the area of the base πr2 π r 2 times the height h . Substitute the values of the radius r=6 and height h=8 into the formula to find the volume of the cone. Pi π is approximately equal to 3.14

7 0
3 years ago
Other questions:
  • 3y+11 plus 7x-30 plus 5x+14 find x and the y
    13·1 answer
  • A Spanish class has a total of 26 students. The number of males is 4 more than the number of females. How many males and how man
    10·2 answers
  • What is the standard form of the equation? 3y-7=-5
    11·2 answers
  • An employer must hire 2 people from a list of 13 applicants. in how many way ways can the employer choose to hire the 2 people?
    9·1 answer
  • The morning announcements said that two out of every seven sixth-grade students in the school have an overdue library book. Jasm
    6·1 answer
  • Please answer!! I will give brainliest to whoever can!
    12·1 answer
  • Were can the height of an obtuse, acute, and right triangle be found? inside outside or on
    6·1 answer
  • Find the value of x-5 when x= 15
    13·2 answers
  • Plz plz help plz fix plz help plz plz reply plz help plz plz help help plz help me help due in 5 mins
    12·1 answer
  • A volleyball team played 25 games. The ratio of games won to games lost was 6:4. How many games did the team win
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!