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arlik [135]
3 years ago
8

S the relation {(3, 5), (–4, 5), (–5, 0), (1, 1), (4, 0)} a function? explain. type your answer below

Mathematics
1 answer:
posledela3 years ago
3 0
Yes it is a function because each domain has only one range means each x has only one y 
x                 y
3.................5
-4................5
-5................0
1................1
4.................0





  

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Find the value of cos θ if the angle θ is in the third quadrant and sinθ= -0.8
Rudiy27

Correct option is D) -0.6.

<u>Step-by-step explanation:</u>

We have sin\alpha  = -0.8 . Also, we know that cos\alpha  = \sqrt{1- (sin\alpha } )^{2} . Let's find out value of cos\alpha  using above formula:

cos\alpha  = \sqrt{1- (sin\alpha } )^{2}

⇒ cos\alpha  = \sqrt{1- (sin\alpha } )^{2}

⇒ cos\alpha  = \sqrt{1- (-0.8 } )^{2}

⇒ cos\alpha  = \sqrt{1- (0.64 } )^{}

⇒ cos\alpha  = \sqrt{0.36}

⇒ cos\alpha  = 0.6

But we know that cos\alpha is negative in third quadrant , Therefore cos\alpha  = -0.6.

Hence, correct option is D) -0.6.

3 0
3 years ago
2 7/9x2/3 please help
Furkat [3]

Answer:

Improper: 2 42/9  proper: 6 6/9

Step-by-step explanation:

2 7/9 x 2/3

find the common denominator which is 9 so now we have,

2 7/9 x 2/9

find the numerator which is,

2 7/9 x 6/9

multiply

2 42/9

This fraction is improper so lets make it proper,

42 goes into 9 four times

so we have,

6/9 + 2 + 4

final answer,

6 6/9

4 0
3 years ago
Pamela used 3/4 m of ribbon to make 10 birthday cards . How much ribbon does she use for each card ?
djverab [1.8K]
I am not 100 percent sure but i think you multiply and the answer is 7.75 if not then try to divid how you get 7.75 is you make 3/4 into a decimal and that becomes 0.75 them multiply by 10 and get 7.75
7 0
3 years ago
How would adding a score of zero affect the mean and mediam game scores
Nimfa-mama [501]

Answer:

Here is the complete question attached with.

The mean score would decrease more than the median score.

Step-by-step explanation:

The numbers for which we have to find the mean and median are:

60,70,80,80,100

Here the mean, \frac{Sum\ of\ all\ observations}{Number\ of all\ observations} =\frac{60+70+80+80+100}{5} =78

Median,=80 as median is the middle term if the observations are arranged in ascending order.

Now as the question says that we have to add a zero to see its effect.

So adding a zero we have

Mean =\frac{0+60+70+80+80+100}{6} =65

Median = \frac{70+80}{2} =75,as number of observations is even terms so we will add two middle numbers and divide it with 2.

So we can conclude that the mean is having more variation than the median.

Mean shows as variation of 78-65=13 where as Median shows a variation of 80-75=5 only.

So our final answer is option D that is "The mean score would decrease more than the median score."

8 0
3 years ago
Plz help ASAP again thank you <br> Multiply
Andrew [12]

Answer:

1/30

Step-by-step explanation:

-1 x -1 = 1

6 x 5 = 30

1/30

5 0
3 years ago
Read 2 more answers
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