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
arsen [322]
3 years ago
12

To determine her power usage​, Keri divides up her day into three​ parts: morning,​ afternoon, and evening. She then measures he

r power usage at 4 randomly selected times during each part of the day. What type of sampling did she use?
Mathematics
1 answer:
marusya05 [52]3 years ago
3 0

Answer:

Stratified Sampling

Step-by-step explanation:

Since Keri divides the day into different strata and each unit is selected from each strata randomly. So, it is Stratified Sampling.

Further, In Stratified Sampling population is divided into several groups such that within the group it is homogeneous and between the group it is heterogeneous. And now a selection of each stratum and unit has an equal chance of selection.

You might be interested in
Solve the rational equation x divided by 6 equals x squared divided by quantity x minus 1 end quantity, and check for extraneous
Dmitriy789 [7]

Answer:

Solution: x=-\frac{1}{5},x=0

Step-by-step explanation:

Given:

The rational equation to solve is given as:

\frac{x}{6}=\frac{x^2}{x-1}

Doing cross product, we get:

x\times (x-1)=6\times x^2\\x^2-x=6x^2\\\textrm{Bringing all variables to the right side, we get:}\\6x^2-x^2+x=0\\5x^2+x=0\\x(5x+1)=0\\x=0\ or\ 5x+1=0\\x=0\ or\ x=-\frac{1}{5}

Now, for x=0, the rational equation is equal to 0. So, x=0 is a solution.

Also, x=-\frac{1}{5} is also a solution.

So, no extraneous solution.

4 0
4 years ago
I asked before and didn’t get an answer I really don’t understand this thanks.
dmitriy555 [2]
The answer is D, because that is what you should get when you multiply it out.

4x^2 times x^2 = 4x^4 because...

1) multiply the 4 and the one in front of the x on the second term = 4 then

2) multiply x^2 times x^2 to get x^4, not x^3, so you can immediately eliminate A and B to save time.

Now let's deal with the second part..."may or may not be" part

A polynomial is an expression with more than two algebraic terms

terms are like...
2x + 3y ---there's two terms there, eventhough the 2 and x are multiplied, it doesn't count (same with the 3 and y)
since it only have two terms, not more than two terms, it is called a binomial, not polynomial. I think that's what they mean by that

one term with a variable (y,x,and so on) is called a monomial

one term with no var is called a constant

there's many more but hope this gave you some help
3 0
3 years ago
Read 2 more answers
Write the equation of the line that passes through the points (5,0) and (-6, -1).
jonny [76]

Answer:

The equation in point-slope form is: \mathbf{y=\frac{1}{11}x-\frac{5}{11} }

Step-by-step explanation:

We need to find equation of line in point slope form that passes through points (5,0) and (-6, -1).

The general equation of point slope form is: \mathbf{y-y_1=m(x-x_1)}

where m is the slope of line.

We need to know Slope m

Finding Slope m

Finding Slope m using formula: Slope=\frac{y_2-y_1}{x_2-x_1}

We have x_1=5, y_1=0, x_2=-6 \ and \ y_2=-1

Putting values and finding slope

Slope=\frac{-1-0}{-6-(5)}\\Slope=\frac{-1}{-6-5}\\Slope=\frac{-1}{-11}\\Slope=\frac{1}{11}

So , slope m is: \mathbf{m=\frac{1}{11}}

Using point (5,0) and slope m =1/22 the equation of point-slope form is:

y-y_1=m(x-x_1)\\y-0=\frac{1}{11} (x-5)\\y=\frac{1}{11}x-\frac{5}{11}

So, the equation in point-slope form is: \mathbf{y=\frac{1}{11}x-\frac{5}{11} }

3 0
3 years ago
4 less than a number n is -15
kiruha [24]

Answer:

n=-11

Step-by-step explanation:

Since -15 is 4 less than -11, it would be -11.


Hope this helped. :)

3 0
3 years ago
What is the rate of change and initial value for the linear relation that includes the points shown in the table? (4 points) x y
AVprozaik [17]

The Initial Value is one, and the Rate of Change is one.

1x+1

Hope this helped out.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Two cyclists start biking from a trail's start 3 hours apart. The second cyclist travels at 10 miles per hour and starts 3 hours
    9·1 answer
  • The residents of a downtown neighborhood designed a​ triangular-shaped park as part of a city beautification program. The park i
    7·1 answer
  • What is the value of the expression 2x2 + 3x-y – 4y2 when x = 2 and y = –4?
    15·1 answer
  • Solve by factoring
    14·2 answers
  • Is it 1,2,3 or 4? help please
    9·1 answer
  • Can someone please help
    15·1 answer
  • 200 years ago, as it became more and more evident that the
    8·1 answer
  • Will mark brainliest
    14·1 answer
  • BRAINLIEST TO CORRECT HURRY NOW BOTH COMPLETE ANSWERS
    13·1 answer
  • What was the goal of the Five-Year Plan?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!