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2 years ago

Determine if the graph is symmetric about the x-axis, the y-axis, or the origin. r = 2 cos 3θ

Mathematics

2 answers:

Allushta [10]2 years ago

7 0

Answer:

y-axis

Step-by-step explanation:

Theta = 10

2cos(30) = sqrt(3)

Theta = -10

2cos(-30) = sqrt(3)

Theta = 180 - 10 = 170

2cos(3×170) = -sqrt(3)

Alex73 [517]2 years ago

7 0

Answer:

It is symmetric about the y-axis.

Step-by-step explanation:

Replace r with -r and θ with -θ.

-r = 2 cos 3(-θ)

-r = -2 cos 3θ

r = 2 cos 3θ

The same equation results so it is symmetric about the y-axis.

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2 years ago

Which is the graph of the linear equation 3x - 4y = -12

melamori03 [73]

Answer:

the graph that goes through the points

(0,3), (-4,0)

Step-by-step explanation:

make y the subject

3x-4y=-12

4y=3x+12

y=(3x+12)/4

now when x=0

y=12/4=3

so coordinates (0,3)

now when y=0

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3 0

3 years ago

Read 2 more answers

P( b.=15/16,p(a and b.=3/4 find p(a

Bess [88]

And or both means we multiply the given probability situations that are mutually exclusive and exhaustive - they cannot occur at the same time.

let P(a)=x

then: P(b) * P(a) =3/4

         15/16 * x = 3/4

          15x/16 = 3/4
therefore x= 3/4 *16/15
          x = 4/5
P(a) = 4/5

hope it's clear

6 0

2 years ago

Yo help me out please.

katrin2010 [14]

Answer:

Step-by-step explanation:

-12 = -3/4x + 3

-9 = -3/4x

-9 = (-3/4) times x

-9 = (-3/4) times 12

hope this helps! :)

6 0

2 years ago

Find the indicated side of the triangle. b 7 45° a b = [?]VO

vodka [1.7K]

Answer:

7√2

Step-by-step explanation:

Thank to the give angle we can say that the two legs are congruent

b = $\sqrt{7^2 + 7^2} = \sqrt{49+49} = \sqrt{98}$

98/2 = 49

49/7 = 7

7/7 = 1

98 = 7^2 x 2

√98 = 7√2

8 0

2 years ago