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
Illusion [34]
3 years ago
9

If you were to randomly survey 50 people at 20 random locations across the country (such as parks, malls, restaurants, etc.), wo

uld this be a random sample? Why or why not?
Mathematics
2 answers:
Sonja [21]3 years ago
7 0
Yes, because everyone has an equal chance of participating.
Natasha_Volkova [10]3 years ago
4 0

Answer:

Yes, it is a valid random sample for if I were to randomly survey 50 people from the phone books of 20 randomly chosen cities.

Step-by-step explanation:

You might be interested in
Help, pls. In an algebra test rn
Nata [24]
I cannot see the picture
6 0
2 years ago
Find the equation of the line through point (2,2) and parallel to y=x+4. Use a forward slash (i.e.”/“) for fractions (e.g. 1/2 f
aleksandr82 [10.1K]

Answer:

The equation of the line is, y = x

Step-by-step explanation:

The constraints of the required linear equation are;

The point through which the line passes = (2, 2)

The line to which the required line is parallel = y = x + 4

Two lines are parallel if they have the same slope, therefore, we have;

The slope of the line, y = x + 4 is m = 1

Therefore, the slope of the required line = 1

The equation of the required lime in point and slope form becomes;

y - 2 = 1 × (x - 2)

∴ y = x - 2 + 2 = x

The equation of the required line is therefore, y = x

5 0
3 years ago
How can you use a coordinate plane to solve perimeter and area problems?<br><br><br> Please help me
lana66690 [7]
Well, you can do
area=legnth times widht
perimiter=2(legnth+width)
then you just subsitute x for legnth and y for width then solve
area=xy
perimiter=2(x+y)
then graph and find the intersection to find the solution
6 0
2 years ago
Bill Ding plans to build a new hardware store. He buys a rectangular lot that is 50 ft by 200 ft, the 50-ft dimension being alon
enot [183]

Answer:

Length a = 59.62

Width b = 67.09

Cost = $10,734.4

Step-by-step explanation:

Solution:

Let a be the length and b be the width.

Area of the rectangle = a x b

a x b = 4000

Cost of the construction:

Cost = 100a + 80(a + 2b)

Cost = 100a + 80a + 160b

Cost = 180a + 160b     Equation of the Cost of the construction.

Now, we need a and b to calculate the minimum cost required to build a lot.

From the area = a x b

we have,

a x b = 4000

b = 4000/a

Putting this equation into the cost of the construction.

We get:

Cost = 180a + 160 x (4000/a)

Cost = 180a + 640000/a

Differentiating with respect to a, we get

C^{'} = 180 - 640000/a^{2}

Putting C^{'} = 0

180 - 640000/a^{2} = 0

Taking LCM

180a^{2} - 640000 = 0

Solving for a

180a^{2} = 640000

a^{2} = 640000/180

a^{2} = 3555.55

Taking square root

a = 59.62

As we know,

b = 4000/a

putting the minimum value of a  = 59.62

b = 4000/59.62

b = 67.09

So, now we have both the dimensions a and b

Putting the values of a and b we will get the cost of the construction.

Cost = 180a + 160b

Cost = 180(59.62) + 160(67.09)

Cost = $10,734.4

Hence, $10,734.4 will be the minimum cost of the construction for Bill Ding.    

5 0
2 years ago
Which figure could be the result of dilating the trapezoid with a scale factor between 0 and 1? On a coordinate plane, a trapezo
Lelechka [254]

Answer:

On a coordinate plane, a trapezoid has points (0, 0), (0.5, 2), (1, 2), (1.5, 0).

Step-by-step explanation:

The given trapezoid has vertices at

(0, 0), (1, 4), (2, 4), (3, 0).

We want to choose from the given options the trapezoid with a scale factor between 0 and 1.

If a scale factor of a dilation is between 0 and 1, the size of the image trapezoid will be smaller than the preimage.

When we analyze the coordinates carefully, the answer is, a trapezoid has points (0, 0), (0.5, 2), (1, 2), (1.5, 0).

The reason is that, when we multiply the coordinates of (0, 0), (1, 4), (2, 4), (3, 0) by 0.5, we obtain (0, 0), (0.5, 2), (1, 2), (1.5, 0).

Hence the scale factor is 0.5 and this is between 0 and 1.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Juan, who is single, is a self-employed carpenter as well as an employee of Frame It, Inc. His self-employment net income is $33
    7·1 answer
  • Circle 1: center (8, 5) and radius 6
    5·1 answer
  • 7. John worked 32 hours last week and 28 hours this week. If he gets paid
    6·1 answer
  • Write an equation in slope-intercept form for a line that has a slope of 1/2 and
    12·1 answer
  • Find the Surface Area of <br> 8 m<br> 5 m<br> 3 m
    15·1 answer
  • Select all of the following equations that would have the point (4, 16) located on their graph.
    11·1 answer
  • Find the lengths of the legs of the right triangles. AC= BC= PR= RQ= Are these triangles similar? Type "yes" or "no".
    5·1 answer
  • Find the 12th term.<br> t(11) = 8<br> t(n + 1) = t(n) - 3
    11·1 answer
  • Ebony but a four year treasury note that pay the equivalent of 3.8% simple interest. She invested $3000 more in a 9 year bond e
    9·1 answer
  • A store is giving a $10 coupon th every 7tgh person, and a $25 coupon to every 18th person, Which person will be the first to ge
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!