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svlad2 [7]
3 years ago
11

Which two of the following are not characteristics of surveys?

Mathematics
1 answer:
OLEGan [10]3 years ago
4 0

Answer: A. The study compares two or more treatments (possibly including "no treatment").  

               C. The study involves one or more treatment groups and a control group.

Step-by-step explanation:

You might be interested in
how many square feet will cover a rectangle 60 feet by 20 feet? Explain how you determined your answer
nika2105 [10]

Answer:

1200

Step-by-step explanation:

2 times 6 = 12

12 times 100 = 1200

Hope this helps if does not please let me know thanks!

7 0
3 years ago
NEED HALP!!! Find the ordered pair $(s,t)$ that satisfies the system
satela [25.4K]

Answer:

(-8/7 ; 5/7)

Step-by-step explanation:

5t + 1/2s = 3 - - - (1)

3t - 6s = 9 - - - - - (2)

Multiply (1) by 12 and (2) by 1

Add the result to eliminate s

60t + 6s = 36

3t - 6s = 9

____________

63t = 45

t = 45 / 63

t = 5/7

Put t = 5/7 in either (1) or (2) to obtain the value of s

3(5/7) - 6s = 9

15/7 - 6s = 9

-6s = 9 - 15/7

-6s = (63 - 15)/7

-6s = 48/7

s = 48/7 * - 1/6

s = - 8/7

5 0
2 years ago
Write the equation of the line that has a y-value that increases by 4 for every x that increases by 1. It also crosses the y-axi
34kurt
Slope = rise/run.      the rise is the increase of y and the run is the increase of x. that would make it 4/1 or just 4. now that you have the slope, plug everything into slope-intercept form. y = mx + b. m = the slope. b = the y-intercept. once every thing is plugged in, then the equation would be y = 4x - 2.
i hope i helped
6 0
3 years ago
An office supply company is shipping a case of wooden pencils to a store there are 64 boxes of pencils in the case if each box o
babymother [125]

Answer:

The case is ten pounds.

Step-by-step explanation:

There are 16 ounces in a pound. Using this information, you can multiply the ounces by the 64 boxes. Then divide the product by 16. You should be left with 10 pounds.

3 0
3 years ago
Read 2 more answers
Please solve this question​
oee [108]

Answer:

\frac{1}{81}

Step-by-step explanation:

Using the rule of exponents

a^{-m} ⇔ \frac{1}{a^{m} }

Evaluating from the inside parenthesis outwards

(-\frac{1}{3}) ^{2} = - \frac{1}{3} × - \frac{1}{3} = \frac{1}{9} , then

(\frac{1}{9}) ^{-2} = \frac{1}{9^{-2} } = 9² = 81 , then

(81)^{-1} = \frac{1}{81}

4 0
3 years ago
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