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
Maru [420]
2 years ago
10

The average of eight numbers is 56. When one of the numbers was left out, the mean decreased to 54. What number was left out?

Mathematics
1 answer:
lozanna [386]2 years ago
5 0

Step-by-step explanation:

Given the average of 8 numbers = 56.

Then the Total sum of 8 numbers = 56 * 8

                                                        = 448.

Sum of 1st three numbers = 49 + 57 + 72

                                           = 178.

So, the total = 448 - 178

                    = 270.

Average of the other 5 numbers = 270/5

                                                      = 54.

Verification:

178 + 270 = 448/8

                = 56.

You might be interested in
Applying the Third Corollary to the Inscribed Angles Theorem A circle is shown. Points A, B, C, and D are on the circle. Lines c
Marat540 [252]

Answer:

  • ∠B = 110°
  • ∠D = 70°

Step-by-step explanation:

Opposite angles in an inscribed quadrilateral are supplementary, so ...

  ∠B +∠D = 180°

  (3x -4) +(2x -6) = 180

  5x = 190 . . . . . . . . . . . add 10, collect terms

  x = 38 . . . . . . . . . . . . . divide by 5

  ∠D = 2(38) -6 = 70

  ∠B = 180 -70 = 110

The measures of angles B and D are 110° and 70°, respectively.

8 0
4 years ago
Write the fractions 5/10 5/100 and 5/1000as decimals. How are the decimals related
Vanyuwa [196]

Answer:

Every zero is added to the denominator, you have to add a zero to the decimal too.

Step-by-step explanation:

5/10 = 0.5

5/100 = 0.05

5/1000 = 0.005

Every zero is added to the denominator, you have to add a zero to the decimal too.

Hope this was helpful :)

4 0
4 years ago
I need help from someone please?!
Andreyy89
3)
(x/3)+(2/5)
(5x/15)+(6/15)
(5x+6)/15

4)
(2/x)+(3/7)
(14/7x)+(3x/7x)
(3x+14)/(7x)

5)
(x/2)+(1/3)+(x/4)
(6x/12)+(4/12)+(3x/12)
(9x+4)/12
3 0
3 years ago
R=2.4cm find the Circumference to the nearest 10th with pi being 3.14
Kazeer [188]
Circumference is found by evaluating C = 2 pi r, where r is the radius of the circle.  Here, C = 2 pi (2.4 cm) = 4.8 pi.
3 0
3 years ago
If there are a number of different sounds being produced simultaneously, the resulting intensity is the sum of the individual in
podryga [215]
Formula: Δ L = 10 × log n. 
<span>Δ L = level difference. </span>
<span>n = number of equal loud sound sources. </span>

n = 5 
10 × log10 5 = +<span>6.9897</span><span> dB compared to the case that only one source is available. </span>
8 0
3 years ago
Other questions:
  • Shelia had 8 yards of frabic. she used 2 1/4 yards to make a dress. how much frabic does she have left?
    15·1 answer
  • The point of concurrency in the diagram below is __________.
    14·2 answers
  • Jackson currently has $35 in his bank account, and he is saving $15 a week to eventually buy a new cell phone. He can represent
    9·1 answer
  • A tutor invited 2 students to a study group. Those 2 students each invited
    11·1 answer
  • I need help with pythagoras’ theorem
    12·1 answer
  • The world's fastest fish, a sailfish, swims at a of 69 miles per hour. Is the distance a sailfish swims propotial to the number
    7·1 answer
  • What is N equal to? I think I know I want to make sure tho :/
    8·1 answer
  • You have to simplify this without any negative exponents. Where would I start?
    14·1 answer
  • PlZ help pleased I need an answer now
    14·2 answers
  • 8TH GRADE MATHHH<br> PLEASE HELPP
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!