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Karo-lina-s [1.5K]
2 years ago
5

Help i dont understand this

Mathematics
1 answer:
True [87]2 years ago
7 0

Answer:

b

Step-by-step explanation:

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Determine if the graph is symmetric about the x-axis, the y-axis, or the origin. r = -5 - 5 cos θ
Grace [21]
Y-axis symmetry=(r, theta)=(-r,theta)
-5-5cos(theta)=r
-r=5+5cos(theta)
no y-axis symmetry
x-axis symmetry=(r,theta)=(r,-theta)
cosine is an even function, so yes it is symmetric around x-axis
origin symmetry=(r,theta)=(-r,theta) or (r, theta+pi)
no, as there is no y-axis symmetry

6 0
3 years ago
What is the solution of -2x = -16
Vilka [71]
Divide both sides by -2

two negatives make a positive and that's true so x = 16/2 so divide it

x = 8 because 2 x 8 = 16 and 2/16 = 8 so true.

Answer: x = 8.
7 0
3 years ago
If a = -3, find the value of<br> a) 2a<br> b) a^2<br> c) 3a^2
White raven [17]

Answer:

a) -6

b) 9

c) 27

Step-by-step explanation:

2( - 3) =  - 6 \\  { - 3}^{2}  =  - 9 \\ 3 {( - 3)}^{2}  =  27

8 0
1 year ago
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61 = r/3 − 7 what is r
WINSTONCH [101]

Answer: r = -244

Step-by-step explanation:

3 0
2 years ago
The number divided by -4 is increased by -63, the result is -45. What is the number? 
Pavlova-9 [17]
X / (-4) + ( -63) = -45 <=> x / ( -4) = 63 - 45 <=> x / (-4) = 18 <=> x = 18 * (-4) <=> x = -72.
3 0
3 years ago
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