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vredina [299]
3 years ago
13

Help Please?? 12. Of the following, which one is an observational study? A. Asking hearing-impaired people to try a new style of

earphone to get their opinion B. Comparing survival rates between treating bone cancer with surgery versus treating it with radiation C. recording the daily output of a balloon factory for 6 months D. polling people on their favorite color I believe it would be 'C', yes?
Mathematics
2 answers:
EleoNora [17]3 years ago
6 0
I don’t really kno but it should be d
Semmy [17]3 years ago
4 0
The answer to your question is d

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I have one third gallon of juice and one sixth gallon. How many more gallons is need to make three gallons
charle [14.2K]

Answer:

2.5 gallons

Step-by-step explanation:

Make the denominators of the fractions the same and combine them

\frac{1}{3} =\frac{2}{6}

\frac{2}{6} +\frac{1}{6} =\frac{3}{6}

Then simplify the fraction

\frac{3}{6} =\frac{1}{2}

Then subtract how many gallons you have from how many you want

3 -\frac{1}{2} = 2\frac{1}{2}

You will need 2.5 gallons to make 3 gallons

3 0
3 years ago
Solve the system of equations using linear combination method or substitution method. Show all steps.
Korvikt [17]

Answer:

{x,y} = {19/12,5/6}

Step-by-step explanation:

7 0
3 years ago
What is an absolute value? What does it do? When would we need to use an absolute value
Nana76 [90]
Absolute Value Absolute Value means ...

... only how far a number is from zero:

<span> <span><span> </span> <span> <span> "6" is 6 away from zero,
and "−6" is also 6 away from zero. So the absolute value of 6 is 6,
and the absolute value of −6 is also 6 </span> </span> </span></span>

More Examples:

<span><span>The absolute value of −9 is 9</span><span>The absolute value of 3 is 3</span><span>The absolute value of 0 is 0</span><span>The absolute value of −156 is 156</span></span> No Negatives!

So in practice "absolute value" means to remove any negative sign in front of a number, and to think of all numbers as positive (or zero).

Absolute Value Symbol

To show that we want the absolute value of something, we put "|" marks either side (they are called "bars" and are found on the right side of a keyboard), like these examples:

<span> <span><span> |−5| = 5 |7| = 7 </span> </span></span> Sometimes absolute value is also written as "abs()", so abs(−1) = 1 is the same as <span>|−1| = 1</span>
3 0
3 years ago
Read 2 more answers
Si en una empresa hay 120 trabajadores 3/8 son españoles y el resto europeos. Cuántos europeos hay?
Kobotan [32]

Answer:

75 Europeos

Step-by-step explanation:

3/8 X 120= 360/8 = 45

120-45= 75

8 0
3 years ago
I also need help with these two
lorasvet [3.4K]

Answer: #13 you need to know that the sides are equal. #14 (7,6)

Step-by-step explanation: #14 in picture

4 0
3 years ago
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