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
andriy [413]
3 years ago
5

What number needs to be added to make a mean of 80 with the numbers 71 80 and 86

Mathematics
1 answer:
pentagon [3]3 years ago
3 0
80*4=320-(71+80+86)=83 So 83 needs to be added.
You might be interested in
Answer soon please, will give brainlest.
Vinil7 [7]

Answer:

1. Range is 37,IQR is 16.5, MAD is 9

2.Range is 35,IQR is 14, MAD is 8

3. Range is 76,IQR is 37, MAD is 19.1

4. Range is 8, IQR is 4, Mad is 20.4

5. Range is 62,IQR is16 , MAD is 13.08

6. Range is 42,IQR is 23,MAD is 12

Step-by-step explanation:

mrk me brainliest plz

6 0
3 years ago
An equation that models the sequence 400, 200, 100, 50, ...
Serga [27]
For this, let's have:
n represent each number, the number after it is its place in sequence
/ means divide

n1 /2 = n2, etc.

3 0
3 years ago
Which expression is equivalent to −1/4x+1/2?
Marat540 [252]
D. 1/4 (-x+2)                  

-x+2/4

3 0
3 years ago
HELP ASAP PLEASE.
ValentinkaMS [17]

Answer:

pls give brainlist

Step-by-step explanation:

a. \frac{50 blocks (L)}{9 blocks(W)\\}  50 x 9 = 450. A=450

b. I can scale the unit rate of the area given above and largen the area of the map. Ex. \frac{7}{3}=\frac{21}{6} <---(scaled by 2)

Then we can enlarge it however we want so,

\frac{21}{6} = \frac{42}{12}  <--(scaled by 2 once more)

If the statement above is true then we can scale times 4.

\frac{7}{3}= \frac{42}{12}\\ <---(scaled by 4)

A= \frac{42}{12\\}

all i can give u at the moment , if u go on M a t h w a y it can help

5 0
3 years ago
Read 2 more answers
Three roots of the polynomial equation x4 - 4x3 - 2x2 + 12x + 9 = 0 are 3, -1 and -1. Explain why the fourth root must be a real
LiRa [457]
Descares Theorem says that the number of roots of a polynomial is equal to its highest exponent, and the roots could be real and/or imaginary (complex).

However is their is one complex root (a + i.b), it's conjugate is also
a root (a-i.b).

In the equation x⁴ - 4x³ - 2x² + 12x + 9 = 0, we have already 3 roots, then the 4rth cannot be a complex one since we don't have a fifth for its conjugate.

3 0
3 years ago
Other questions:
  • A 3-mi cab ride costs $7.30. A 8-mi cab ride costs $15.30. Find a linear equation that models a relationship between cost c and
    10·1 answer
  • Sean says that to add a number to -100 and still have -100 is to add zero. Candice says that she can add two numbers to -100 and
    6·2 answers
  • The dot plot shows the number of goals that the Springlane High School soccer team scored per game last season. How many games d
    14·2 answers
  • I need help I dont understand. please. BTW the pool is 8,000 gallons.Thanks
    13·1 answer
  • !!!!!!!!15 POINTS FOR ANSWERING THIS CORRECTLY!!!!!!!!
    12·1 answer
  • Answer all of 9 with work shown
    13·1 answer
  • Sam takes 6 apples from the basket, that is, only 25% of all apples in the
    13·1 answer
  • Please help me I will give brianliest if u are right<br> 2.5(10x+8)+3
    13·2 answers
  • 50 minus 17 4/6 plzzzzzzzzzz answer rn
    5·2 answers
  • How much would a Jacket cost if they were originally marked for $275 but on sale for 10% off. (No tax) Write your answer and exp
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!