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
sveticcg [70]
1 year ago
10

SAT scores are normally distributed, with a mean of 500 points and a

Mathematics
1 answer:
babymother [125]1 year ago
8 0

Recalling that SAT scores are always expressed as multiples of 10, then the points we get on the test will be 628.

<h3>What do you mean by standard deviation?</h3>

In statistics, Standard deviation is a measure of the variation of a set of values.

σ = standard deviation of population

N = number of observation of population

X = mean

μ = population mean

WE have been given that SAT scores are normally distributed, with a mean of 500 points and a standard deviation of 100 points.

The solution as follows;

Let be X: scores of SAT

P(X ≥ x) = 0.9

P((X - 500)/100 ≥ (x - 500)/100) = 0.9

P(Z ≥ z) = 0.9

z = 1.28

1.28 = (x - 500)/100

128 + 500 = x

x = 628

Recalling that SAT scores are always expressed as multiples of 10, then the points we get on the test will be 628.

Learn more about standard deviation and variance:

brainly.com/question/11448982

#SPJ1

You might be interested in
Substitution: y-2x=-6 and 5x-y=9
Dmitrij [34]
<span>y-2x=-6 and 5x-y=9   

step 1: isolate y in the first equation

y = 2x - 6

step 2:  substitute the y value on the 2th equation:

5x-(2x-6)=9

step 3:  solve the present equation:

5x - 2x + 6 = 9
3x = 9-6
3x = 3
x = 1

step 4: get the y value by replacing the value of x in </span>y = 2x - 6:
<span>
y = 2*1 - 6
y = 2 - 6
y = -4

S={1, -4}



</span>
7 0
3 years ago
Read 2 more answers
What is the value of x? (Type an integer or a decimal.)
AfilCa [17]

Answer:

2.8

Step-by-step explanation:

10× X = 7× 4

X = 7×4/10 = 2.8

4 0
3 years ago
Find the height of a right square pyramid that has a rectangular base area of 70 square units and a volume of 140 cubic units.
Lostsunrise [7]

Answer:

B. 6 units

Step-by-step explanation:

V =  {a}^{2} \frac{h}{3} \\  \\ 140  = 70( \frac{h}{3}) \\  \\ 6 = h \\  \\ 140 = 70(2)

I am joyous to assist you anytime.

5 0
3 years ago
Danielle earns a 7.75% commission on everything she sells at the electronics store where she works. She also earns a base salary
kaheart [24]

Answer:

ok so this can be represented as

7.75x+675=1062.50

-675

7.75x=387.5

divide by 7.75

x=50

Hope This Helps!!!

3 0
2 years ago
Do I use LCM or HCF? And how can I decide which to use? (Brainliest if you can answer the whole thing)
kow [346]

Answer:

As far as i know you should go for LCM that would be more convenient and easy to do

4 0
2 years ago
Other questions:
  • Determine the value of r so the line passing through each pair of points has the given slope
    15·1 answer
  • What is the area of a triangle that has a base of 3 feet and a height of 6 feet?
    10·1 answer
  • Can anyone help us on this question
    15·1 answer
  • An artist is arranging tiles in rows to decorate a wall. Each new row has 2 fewer tiles than the row below it. If the first row
    10·2 answers
  • Help me asap!!!! its an emergency
    10·2 answers
  • I need help please !
    12·2 answers
  • Point A is located at (1, 5), and point A′ is located at (-2, 1). What is the distance from B to B′ ?
    7·1 answer
  • Camile is taking a road trip to see nicki minaj in
    12·2 answers
  • What is the cube root of -729ab6?<br> O-9ab2<br> O<br> -9ab3<br> O-8a3b2<br> O<br> -8a²b3
    11·1 answer
  • Consider the differential equation dy/dx= e^x-1/2y. If y = 4 when x = 0 what is a value of y when x = 1?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!