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belka [17]
2 years ago
5

Select all the correct answers. Which of these relations are functions?

Mathematics
2 answers:
andreev551 [17]2 years ago
6 0

Answer with Step-by-step explanation:

A function is a map from non empty set a to non empty set B such that corresponding to each element of A there exist unique image in B.

A) y=5

Corresponding to each x, there exist a unique element of each element which is 5

Hence, it is a function

B) x= -2

Corresponding to the point -2, there exist more than one image

Hence, it is not a function  

C) y=2x-5  

Corresponding to each x,the value of y is unique

Hence,it is a function

D) 2y=x-4

Corresponding to each x,the value of y is unique

Hence,it is a function

Hence, Correct options are:

A) y=5

C) y=2x-5  

D) 2y=x-4

TEA [102]2 years ago
3 0
The answer is A C D your answer
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Tori bought 24 candy bars for 69 cents each. She used partial products to find the total cost in cents. Which are NOT possible p
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Answer:

B. 36 C. 180 D. 240 E. 1,656

Step-by-step explanation:

Partial product is the multiplication of individual digit of a number in turn with each digit of the others where each digit maintains its place.

Using distributive property to multiply 24 × 69 to determine our partial products:

i.e.

24 × 69 = 24 × (60 + 9)

= (24 × 60) + (24 × 9)

= 60 (20 + 4) + 9(20 + 4)

So; we can have:

= (60 × 20) + (60 × 4) + (9 × 20) + (9 × 4)

= 1200 + 240 + 180 + 36  

= 1656

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3 years ago
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Answer:

f(3)=122

Step-by-step explanation:

4 0
3 years ago
Please help !!
olga2289 [7]
If you have learned how to find the line of best fit manually, then you can do it that way. Perhaps you may want to just find a line that can connect at least two of the points and I believe that that line will be able to represent the other points because, in general, the points are pretty close to one another. 

If you don't want to do it manually and have a graphing calculator (which I recommend) then you can use that to find the line of best fit (and if you want then you can see how precise your points are with your r^2 value). Or there is a website (http://illuminations.nctm.org/Activity.aspx?id=4186), which you can use to help you to find the equation of that particular line. 

Once you have that done, then you can substitute 2009 for the x value in the equation and then see what y value the equation produces. That will then be your answer :) 
4 0
3 years ago
If you go out to eat with 3 friends and your meal was $72.50, what should you leave for gratuninty if you want to tip your waite
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Answer:

$10.88 or round up to $11

Step-by-step explanation:

Since 15 is expressed as a percent, you can convert it to a decimal.

.15, which can also be 15/100 if you were to write it as a fraction.

You are trying to find 15% of 72.50 so you would need to multiply your new decimal (.15) to your meal total. This will give you 10.875 or 10.88.

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vladimir1956 [14]
25,600 will be the bacteria population after doubling every 30 minutes for 3 hours.
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