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
Gnoma [55]
3 years ago
9

scores on a test have a mean of 67 and a standard devation of 10. michelle has a score of 87. convert michelle score to a z-scor

e?​
Mathematics
1 answer:
klasskru [66]3 years ago
6 0

Answer:

z-score = 2.

Step-by-step explanation:

The z-score = (x - m) / d   where x =the person's score, m = the  mean and d = the standard deviation.

So we have (87-67)/10

= 2.

You might be interested in
A segment has endpoints A(-3,5) and B(2,1) find the midpoint M of the segment
Vlad1618 [11]

Answer:

Yes

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What is the answer to this?
KatRina [158]

Answer:

z^11 is the ans if we follow laws of indices...

8 0
3 years ago
Read 2 more answers
Simplify completely x^2+4x-45 / x^2+10x+9
S_A_V [24]

Answer: x - 5/x + 1

Step-by-step explanation:

This algebraic fraction

The task to be performed here is factorisation and simplification. Now going by the question,

x² + 4x - 45/x² + 10x + 9, the factorisation of

x² + 4x - 45 = x² + 9x - 5x - 45

= x(x + 9 ) - 5(x + 9 )

= ( x + 9 )(x - 5 ), don't forget this is the algebraic fraction's Numerator

The second part

x² + 10x + 9 = x² + x + 9x + 9

= x(x + 1) + 9( x + 1 )

= ( x + 9 )( x + 1 ), this is the algebraic denominator.

Now place the second expression which is the denominator under the first expression which is the numerator.

( x + 9 )( x - 5 )/( x + 9 )( x + 1 ).

You can see that, ( x + 9 )/( x + 9 ) divide each other , therefore therr then cancelled and left with

x - 5/x + 1

4 0
3 years ago
3x+9 = 4x-2<br><br> How do you solve for x?
Anna35 [415]
I wish I can help but get Photomath it’ll help you trust :) good luck
5 0
3 years ago
Each table in the cafeteria can seat 10 students.how many tables are needed to seat 40 students
Vitek1552 [10]
Hi there!

To solve this problem, we need to divide the total amount of tables by the amount of students:

40 / 10 = 4

So, we need 4 tables to seat 40 students. 

Hope this helps!
3 0
3 years ago
Read 2 more answers
Other questions:
  • A dog pen 10 ft by 30 ft is needed. You need to decide how much fence is needed. What concept is used to solve the problem?
    13·1 answer
  • 162 water bottles in nine cases unit rate
    15·1 answer
  • BRAINLIESTTT ASAP!! PLEASE HELP ME :)
    8·1 answer
  • The histogram represents the number of gallons of gasoline that drivers purchase weekly. Which bar represents the number of gall
    5·1 answer
  • JOIN ME ON AMOUNG US <br>RSARTQ<br>plz join​
    6·2 answers
  • Find the solution to the differential equation dx/dy+y/3=0 subject to the initial conditions y(0)=12.
    11·1 answer
  • Insert parentheses in expression 2 so that it has a value of 4. Then show why your expression has a value of 4.
    9·1 answer
  • Please help on this!
    10·1 answer
  • A survey revealed that 60% of people are entertained by reading books, 50% are entertained by watching TV, and 20% are entertain
    9·1 answer
  • YALL PLEASE HELP, need to turn this in ASAP
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!