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
KIM [24]
4 years ago
7

The mean is 18.1

Mathematics
1 answer:
julsineya [31]4 years ago
5 0
The standard deviation is 3.

The formula for a z-score is

z = (X-μ)/σ

Using our information, we have

-1.7 = (13-18.1)/σ

Multiplying both sides by σ, 
-1.7σ = 13-18.1
-1.7σ = -5.1

Divide both sides by -1.7:
-1.7σ/-1.7 = -5.1/-1.7
 σ = 3
You might be interested in
In what form is the following linear equation written? 3x-2y=4. A. Point-slope
faltersainse [42]
I believe it is standard. The equation for standard is ax+by+c.
7 0
3 years ago
Through: (1, 3), perp. to y = x + 5
MAXImum [283]

Answer:

y = 3x + 2

Step-by-step explanation:

Convert the equation to slope intercept form to get y = –1/3x + 2.  The old slope is –1/3 and the new slope is 3.  Perpendicular slopes must be opposite reciprocals of each other:  m1 * m2 = –1

With the new slope, use the slope intercept form and the point to calculate the intercept: y = mx + b or 5 = 3(1) + b, so b = 2

So y = 3x + 2

8 0
3 years ago
Determine the length of the model.<br> -60 ft-<br> 1 in. = 8 ft<br> =
Stells [14]

Length of the model = 11.6 inch
3 0
3 years ago
What is the value of x?
Serjik [45]
The triangle ADC and the triangle CDB are similar. Therefore:
\dfrac{x}{6}=\dfrac{6}{8}\ \ \ \ |cross\ multiply\\\\8x=6\cdot6\\\\8x=36\ \ \ |:8\\\\x=4.5
Answer: A 4.5

6 0
3 years ago
A polnt represents:
Allushta [10]

A point represents a location. A coordinate on a plane .

The intersection of two planes is a line.

5 0
3 years ago
Other questions:
  • A small theater had 8 rows of 23 chairs each. Workers just removed 6 of these chairs. How many chairs are left?
    13·1 answer
  • Solve the equation. <br><br> -2(x+5)=4
    15·2 answers
  • (3^2 +4) -6+4=<br><br> {^ means power to...}
    9·1 answer
  • Help!!! Solve for x!! Pls!!!
    11·2 answers
  • (x-2)+(x+6)<br> Please explain
    9·1 answer
  • Grade 9 transformation graph
    10·1 answer
  • Draw a picture of the base and label the dimensions 140 17ft 4t Shape of the base Formula for area Perimeter of the base (P)= Ar
    9·1 answer
  • Sal purchases a new gaming system and games for $530. The tax is 7%. How much would he spend in taxes only ?
    6·2 answers
  • Thomas observed that his friend blinked an average of three times every 15 seconds.
    5·1 answer
  • Evaluate the double integral int int y^3 dA where D is the triangular region with vertices (0,1), (7,0) and (1,1).
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!