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Irina-Kira [14]
4 years ago
7

a bookstore owner asks every fifth customer on a single day if he or she owns a e-book reader . select yes or no for each questi

on . is this a random sample of the store customers ? yes or no is this a random sample of the general population ? yes or no explain your answers.
Mathematics
1 answer:
Masteriza [31]4 years ago
6 0
Yes, it is random because it isn't convenient for him.
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If p, q are zeroes of polynomial f(x) =2x^2-7x+3,find the value of p^2+q^2​
Elza [17]

Answer:

p^2 + q^2 = 22/9.

Step-by-step explanation:

For a quadratic function ax^2 + bx + c if the zeroes are A and B then

A + B = -b/a and AB =  c/a.

2x^2 - 7x + 3

Now p and q are the zeroes of the above function so

p + q =  7/3 and pq = 3/2.

Now p^2 + q^2 = (p + q)^2 - 2pq

= (7/3)^2 - 2* 3/2

=  49/9 - 3

= 49/4 -  27/9

= 22/9.

4 0
3 years ago
HELP PLEASE
puteri [66]

Answer:

In the real house, the area of the floor is 112 square feet

 

3 0
4 years ago
Name the geometric terms modeled by a wall <br> and floor
Gwar [14]

The geometric terms modelled will be:

1. Plane

2 Point

3Point

4Plane

5Line

6.Point

7Point

8 Plane

9.Plane

10.Line

<h3>What is a line?</h3>

It should be noted that a line is a one-dimensional figure, that has length but no width. It should be noted that a line is made of a set of points that is extended in opposite directions.

The plane is flat surface.

Learn more about line on:

brainly.com/question/1655368

#SPJ1

Name the geometric term modeled by each object.

1. wall of a classroom

2. a knot in a piece of thread

3. tip of a needle

4 floor of a room

5 edge of a table

6. tip of a pencil

7 far distant star

8 screen of a flat TV

9 sheet of paper

10. light beam

7 0
2 years ago
What is the area of this face?<br> A.150in2<br> B.100in2<br> C.400in2<br> D.200in2
Levart [38]

Answer:

200 in squared.

Step-by-step explanation:

The top face has a height of 10, it also has a side length of 10. 5 plus 5 equals 10. These faces are squares, so the sides are equal. In this case, they 10 by 10. To find the of the face you do 10 times 10 times 2 because there are 2 figures, or you can find the area of one (100) and the area of the other (100) and add the areas up to get the area of the face. Hope this helps!

4 0
3 years ago
Read 2 more answers
Match the reasons with the statements. GIVEN: x2 + 6x + 2x + 12 = 0 TO PROVE: x = -6 or x = -2 1. x2 + 6x + 2x + 12 = 0 Subtract
mestny [16]

Given: x^2 + 6x + 2x + 12 = 0.

1. Combining like terms (here terms 6x and 2x both contain x, then we can combine them):

x^2+(6x+2x)+12=0,\\\\x^2+8x+12=0.

2. Distributive postulate:

x^2+8x+12=(x+6)(x+2).

The equation is

(x+6)(x+2)=0.

3. Zero product postulate (zero product postulate state that if a product of two factors is equal to zero, then first factor is equal to zero or second factor is equal to zero):

x+6=0 \text{ or } x+2=0.

4. Subtraction property of equality:

a) subtract 6 from the first equation:

x+6=0\Rightarrow x+6-6=-6, \ x=-6.

b) subtract 2 from the second equation:

x+2=0\Rightarrow x+2-2=-2, \ x=-2.

6 0
3 years ago
Read 2 more answers
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