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ad-work [718]
3 years ago
6

After conducting a survey of all her classmates, Midge discovers that the amount of money everyone spends buying books each mont

h has a mean of $30. What does the mean say about the amount her classmates spend on books?
Half of her classmates spend exactly $30 per month buying books.

Half of her classmates spend more than $30 per month buying books.

The majority of her classmates spend $30 per month buying books.

If the amount spent on books per month by all her the classmates is leveled, that amount would be $30.
Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
3 0

The mean is the average of the numbers: a calculated "central" value of a set of numbers.

Therefore: If the amount spent on books per month by all her classmates is leveled that amount would be $30

To calculate it: add up all the numbers, then divide by how many numbers there are

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Solve each given equation and show your work. Tell whether it has one solution, an infinite number of solutions, or no solutions
Ahat [919]

(A)6x+4x-6=24+9x

10x-6=24+9x

10x-9x=24+6

x=30.     (only 1 solution)

(B)25-4x = 15-3x+10-x

25-4x = 5-4x

25-5 = 4x-4x

30 = 0        (No solution)

(C)4x+8 = 2x+7+2x-20

 4x+8 = 4x -13

 4x-4x = -13-8

 0 = -21       (No solution)

4 0
4 years ago
Read 2 more answers
A bag contains 15 marbles. The probability of randomly selecting a green marble is 1/5. The probability of randomly selecting a
slava [35]

Answer:

6 blue marbles

Step-by-step explanation:

Given;

Total number of marbles N = 15

probability of randomly selecting a green marble

P(G) = 1/5

The probability of randomly selecting a green marble, replacing it, and then randomly selecting a blue marble P(G∩B) = 2/25

P(G∩B) = P(G) × P(B)

P(B) = P(G∩B) ÷ P(G)

The probability of selecting a blue marble

P(B) = 2/25 ÷ 1/5 = 2/5

The number of blue marbles N(B) = P(B) × N

N(B) = 2/5 × 15 = 6

There are 6 blue marbles

7 0
3 years ago
Find the quotient.<br> 18.)97.2
Lostsunrise [7]

Answer:

540

Step-by-step explanation:

540= 18% of 97.2

5 0
3 years ago
Help mee plezzzzzzzzzzzzzzzzzzz
Gnesinka [82]

Answer:

-81

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Which is a solution to the equation?
Brrunno [24]

Answer:

-7 or 4

Step-by-step explanation:

use foil to get the quadratic equation:

x^2+5x-2x-10=18

x^2+3x-10=18

bring "18" to the left:

x^2+3x-10-18

x^2+3x-28

so what*what= -28

and

what+what=3

factors of -28: -7,4   -4,7   14,-2   -14,2    -28,1   -1,28

factors whose sum is 3: 7,-4

so substitute "7,-4" in place of 3:

x^2+7x-4x-28

2) split it in two groups

group 1) x^2+7x

group 2) -4x-28

x^2+7x has a GCF of "x"

x(x+7)

group 2) -4x-28 has a gcf of "-4"

-4(x+7)

3) (x-4) (x+7)=0

x-4=0

x=4

x+7=0

x=-7

x=4,-7

Hope this helps!

4 0
3 years ago
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