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
Amanda [17]
3 years ago
11

The scores on a standardized test are normally distributed with a mean of 80 and standard

Mathematics
1 answer:
blsea [12.9K]3 years ago
3 0

Answer:

84.5

Step-by-step explanation:

Given :

Mean μ = 80

Standard deviation, σ = 5

Z = number of standard deviations from the mean, Z = 0.9

Teat score, x

Using the Zscore formula :

Zscore = (x - μ) / σ

Plugging in our values :

0.9 = (x - 80) / 5

Cross multiply

0.9 * 5 = x - 80

4.5 = x - 80

4.5 + 80 = x

x = 84.5

Test score = 84.5

You might be interested in
Explain why the polynomial 144x2 − 200x + 81 is not a perfect square.
Alex Ar [27]

Answer: It's not

Step-by-step explanation:

A perfect square is always (x+y)^{2}, where x^{2} +2xy+y^{2}.

Knowing this, we can square root 144x to get 12x. Square rooting 81 gets us 9. Unfortunately, if we multiply 12 and 9 together, then double it, we get 216, which is definitely not 200.

Therefore, the polynomial is not a perfect square.

5 0
2 years ago
What is the midpoint of the segment shown below?
jeka94

Answer:

B. (4,-3)

Step-by-step explanation:

Hope this helps! Plz mark brainiest

8 0
4 years ago
Read 2 more answers
56of the 90pets in the pet show are cats 4/5of the cats are calico cats. What fraction of the pets are calico cats?
meriva
To get the answer, we can divide 56 by 5 to find one fifth of the cats. Then, we can multiply this number to get four fifths of the cats. Then, we put this number over 90 since there is 90 pets in the entire show. Then, this answer ends up being about half all of the pets are calicos.
4 0
4 years ago
Read 2 more answers
All the numbers from 1 to 99 are multiplied together. Use a pattern to determine the last digit of the product. Justify your ans
monitta

Answer:

answer = 0

Step-by-step explanation:

99 x 98 x 97 x 96 x 95 x 94 x 93 x 92 x 91 x 90 ....etc

it will get zero eventually

4 0
3 years ago
Factor x^5+4x^4−7x^3−34x^2−24x
zloy xaker [14]
This is your perfect answer

7 0
3 years ago
Other questions:
  • 0.6 as a fraction and what is 3/4 as a decimal
    7·2 answers
  • F(n) = f(n – 1) + f(n – 2); f(1) = 2; f(2) = 1.<br><br> Find the 12th term.
    7·1 answer
  • Mr. De Leon’s Geometry class has 34 students. After lunch everyone returns to the classroom. Within an hour, each person produce
    9·1 answer
  • How do you find the median of the set of numbers that are not listed in order, like 1, 2, 4, 3, 5, 3, 6, 7, 8?
    11·2 answers
  • FIRST TO ANSWER GETS BRAINLEIST (last one for the night!)
    5·2 answers
  • The Smiths spend 12% of their budget on entertainment. Their total budget this year
    8·1 answer
  • X^4+2x^2-x+1 divided by x^2+x+1​
    7·1 answer
  • How do you solve 2x+4y=7 and -2x +3y=14
    10·1 answer
  • Calculate the distance between the points A= (3, -9) and C= (8, -4) in the coordinate plane round your answer to the nearest hun
    14·1 answer
  • -4x +11y =5<br> 4x - 11y = -5
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!