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kirill [66]
3 years ago
5

HELP ME ASAP PLS :)

Mathematics
1 answer:
koban [17]3 years ago
8 0

Answer:

A or D

Step-by-step explanation:

I would think that it would be a valid sample because the first nine people were selected to participate.  But, it also could not be a valid sample because it is only a short study.  If there are more than one answer, I would say those two, but if it is only one answer, it is either A or D.  I think....

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Jeff uses the expression 2(3b + 1) to determine how many books (b) he needs to order for his store. If b = 12, how many books sh
kari74 [83]

Answer:

73

Step-by-step explanation:

you write 12 instead of b

4 0
3 years ago
Read 2 more answers
Kevin bought 3 dvds for 45.99 how much would 7 dvds cost?
Alecsey [184]

Answer:

I am pretty sure the answer would be $107.31. Sorry if I'm wrong.

Step-by-step explanation:

First you take the total of the 3 DVD's (45.99) and you divide that by 3 (number of DVD's) to get 15.33 which is called the unit price. Then, you take your unit price and multiply that by how many items you are going to buy.

45.99 / 3 = 15.33

15.33 x 7 = 107.31

6 0
3 years ago
In AABC, 2B= 2C, and m_A= 349. Find mzo<br> A. 56°<br> B. 730<br> c. 112°<br> 1460
Leno4ka [110]

Answer:

i think it' =-8abc(a+b-c)

Step-by-step explanation:

7 0
3 years ago
PLEASE HELP
dalvyx [7]

Answer:

The answer is C.

Step-by-step explanation:

4 0
3 years ago
How do you answer the picture below?
3241004551 [841]

Answer:

42cm²

Step-by-step explanation:

because if the perimeter of the rectangle is 28 then the length is 5, 5 - 11 = 6, the formula for finding the trapezium is to add the 2 parallel sides, half them, then times them with the length so your sum will look like this, 5+9=14, (i knew the other side was 9 as the length of AB is the same as the length of FC, which is the one of the parallel sides of the trapezium) then we do 14÷2=7, finally we times 7 by 6 which is 42cm²

3 0
3 years ago
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