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
nikdorinn [45]
2 years ago
7

On a standardized exam, the scores are normally distributed with a mean of 145 and a standard deviation of 25. Find the z-score

of a person who scored 210 on the exam
Mathematics
1 answer:
Kryger [21]2 years ago
5 0

Answer:

z = 2.6

Step-by-step explanation:

<u>Use the formula for z-score</u>

z=\frac{x-\mu}{\sigma}\\ \\z=\frac{210-145}{25}\\ \\z=\frac{65}{25}\\ \\z=2.6

This tells us that this person's score of 210 places them 2.6 standard deviations above the mean

You might be interested in
Anyone help me ASAP, its due in an hour, plz show all the working, THANK YOU SO MUCH
Leona [35]

Answer:

Step-by-step explanation:

First, start out with the parent function:

y = b^{x}

Now, we look at the transformations, and make the equation.

We see that the graph <u>shifted down 4 units</u>, since the <u>graph's horizontal asymptote</u> is at y = -4.

y = b^{x} - 4

We see point (0, -3) to point (1, -1). The value of b would be 3. The reason is that when you <u>plug 0 in, you get 1, then 1 - 4 equals 3. (0, -3),</u>

<u>Then, when you plug in 1, you get 3, then 3 - 4 equals -1. This matches up with the graph.</u>

<u />

This is the answer:

y = 3^{x}-4

#teamtrees #WAP (Water And Plant)

8 0
3 years ago
Label the place value 7,854.209
yuradex [85]
7(thousands)
8(hundreds)
5(tens)
4(ones)
.(decimal point)
2(tenths)
0(hundredths)
9(thousandths)
Hope this helps! I would appreciate it if I got brainliest! Thanks! =D
6 0
3 years ago
Read 2 more answers
How can you use the quadratic formula to complete a square?
Marina86 [1]
It has become somewhat fashionable to have students derive the Quadratic Formula themselves; this is done by completing the square for the generic quadratic equation ax2 + bx + c = 0. While I can understand the impulse (showing students how the Formula was invented, and thereby providing a concrete example of the usefulness of abstract symbolic manipulation), the computations involved are often a bit beyond the average student at this point.
6 0
3 years ago
Read 2 more answers
Mike argues the following side lengths can make a triangle. Sam says he is incorrect. Who is correct and why? 3m, 5m, 10m
victus00 [196]

Answer:

Sam is correct

Step-by-step explanation:

The third side is the one with greatest length. To make a triangle the other two lengths have to be greater than the greatest one when combined.

Hope this Helps.

5 0
2 years ago
Read 2 more answers
Jessie graphed one of the lines in a system of equations: Y=3x-2 If the system has an infinite number of solutions, which statem
katen-ka-za [31]

Answer:

2, 4, and 5

Step-by-step explanation:

There are three states that a system of linear equations can be in. Intersecting, parallel, and overlapping. Intersecting results in one solution, parallel results in none, and overlapping makes all solutions that are on the line correct. The question says that there are infinite solutions, so it must be overlapping. We can immediately rule out the first one because only points that lie on the line can be solutions. Since we know that the system has all of the solutions shown, 2 has to be true. 3 is the same idea. When you plug the x value (20) into the equation, you get the y value (58) meaning that it must be true. 5 is stated above.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Use expanded form or number name to complete the definition.
    11·1 answer
  • En una fábrica de refrescos se envasan 1100 litros en 400 envases, unos de 2 litros y otros de 3 litros. ¿Cuantos envases de 2 y
    10·1 answer
  • The smallest known bacteria are from the genus Mycoplasma and can measure as small as 300 nanometers in diameter. Given that 1 m
    13·1 answer
  • Two cars, one going due east at 25 m / sec and the second going due south at 50/3 m / sec are traveling toward the intersection
    7·1 answer
  • Job A -Sales- offers a base salary of $1,000 per week plus 3% commission on all sales above $3000. Job B -Sales- offers a base s
    9·1 answer
  • 24. Rectangle A is 16 feet wide and is 8 feet longer than Rectangle B which is 14 feet wide.
    6·1 answer
  • (3+ 1/2) x 14 pls help me
    8·2 answers
  • PLEASE HELP urgent math questions
    15·1 answer
  • 20 POINTS! PLATO HELP! NUTRITION CLASS!
    8·1 answer
  • Twice a number is 48 less than 4 times a number. find the number
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!