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____ [38]
3 years ago
9

R:{(1,2),(1,−2),(−2,3)} Is this a function?

Mathematics
1 answer:
sdas [7]3 years ago
7 0

Answer:

No, it is not a function because one of the x values have two different y values

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What is the value of r, the part of the job that Marina can complete in 1 hour?
EastWind [94]

Answer:

0.4

Step-by-step explanation:

so, Katherine can do 0.1 of the job per hour. (if she needs 10 hours for the job, each hour she can do the whole divided by the time, so 1/10, which is 0.1)

if in two hours she and Marina can be done, then Marina will do 1(the whole job)-2/10 (twice as much as she can do in an hour)=0.8 of the job. So if Marina does 0.8 of the job in two hours, each hour she will do half of it: 0.4 - and this is the correct answer 

5 0
3 years ago
What theorem or postulate can be used to justify that two triangles are congruent
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4 0
3 years ago
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Explain how showing fractions with models and a number line are alike and different?
Otrada [13]
Showing fractions can be expressed in model and number line.
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Using a number line, the line starts from 0 to the number of the denominator. You put a marker to the number that is the same as the numerator.

Both model and number line use the value of the numerator and denominator. What makes them different is how they are presented. Model can easily be understood compared to number line.
5 0
3 years ago
5x+7y=31 , 3x-5y=21??​
nikklg [1K]

Answer:

yes

Step-by-step explanation:

5 0
3 years ago
Write the inequality given in the diagram below
11111nata11111 [884]

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x ≥ - 1

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the solid circle above - 1 on the number line indicates that x can equal - 1

the arrow points right indicating x is greater than or equal to - 1 , that is

x ≥ - 1

4 0
2 years ago
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