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
True [87]
3 years ago
12

Erica wants to know how many books on average are in school libraries in her county. She randomly calls 50 school libraries in h

er county and finds out how many books they have. She adds the number of books together and divides by 50. Her conclusion is there are an average of 18,000 books in a school library. Erica's conclusion is
Mathematics
2 answers:
Rus_ich [418]3 years ago
5 0
<span>valid. She used a representative sample
</span>because she correctly found the average and 18,000 is a reasonable number to get for a the problem
Svet_ta [14]3 years ago
5 0

Answer:

the answer is C. because Even though Erica only called 50 school libraries, this is a sufficient number. Erica’s conclusion is valid. She used a representative sample.

You might be interested in
Which system is equivalent to<br> y= 9x^2<br> x+y=5<br> ?
melomori [17]

Answer : Option A

Explanation:

we can clearly see that from x+ y=5 we can substitute  y = 5-x in y = 9x^2

Option B is clearly incorrect  x can not be y -5

Option C  is incorrect because y can not be 5 +x

Option D is incorrect because  its y = 9x^2 not y^2 =9x^2 so y can not be 3x

if its y^2 = 9x^2 then  only  implies y =  3x

7 0
3 years ago
Read 2 more answers
The committee is planning a party and 150 guests are expected. Each package of plastic spoons contains 24 spoons.
puteri [66]

Answer:

7 packages

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Read the caption thank you :)) if you know it let me know!
Stella [2.4K]

Answer:

∠ A = 50°

Step-by-step explanation:

In a parallelogram, consecutive angles are supplementary, sum to 180°

∠ A + 130° = 180° ( subtract 130° from both sides )

∠ A = 50°

3 0
3 years ago
After a 20% price reduction, a cordless phone sold for $48. What was the phones price before the reduction?
GalinKa [24]
After 20% reduction the price is $48 which means $48 is only 80% of the original price...so let x= original price 
<span>48=.8x </span>
<span>60=x </span>
<span>it was $60

</span>
6 0
3 years ago
What is two-thirds a number plus 4 is 7
andriy [413]
2/3x + 4 = 7
         -4    -4
4 cancels out.
2/3x = 3
x 3      x3
6/3 = 2x = 9
         /2     /2
2 cancels out.
x = 9/2 = 4.5

3 0
3 years ago
Read 2 more answers
Other questions:
  • The diagram represents the truth values of the statements p and q.
    12·2 answers
  • What is the solution of the system of equations?<br><br> y=56x+1<br> −x+y=2
    11·1 answer
  • Luis has four times as much dime than quaters. total is $6.75
    10·2 answers
  • Graph the equations to solve the system. y = x + 4 y = -x - 6 choose the correct answer a.) solutions: all numbers on the line
    10·1 answer
  • A rocket releases a satellite into orbit around Earth, The satellite travels at 2000 m/s in 25 seconds. What is the acceleration
    7·1 answer
  • I need help with this problem. It's urgent
    11·2 answers
  • (-3,3.6) (5,2) what is the rate of change of y with respect to x for this function.
    11·1 answer
  • What is the affect on the graph of the linear parent function f(x) equals X when FX is replaced by FX +3
    11·1 answer
  • 114.3 is what percent of 288? Round to the nearest hundredth. Please don’t get this wrong.
    6·1 answer
  • G (r)=-5r+13<br> g(3) Evaluate Functions
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!