Y=3x
D. (-10, -30)
Replacing in the equation;
x=-10
y=3(-10)
y=-30
There are 2 formula to find the circumference of a circle.



is approximately 3.14
r is radius
D is diameter
and just a side note,

Hope that formula helps you :)
Answer:
10,30,90,270,810,2430
The formula here seems to be multiplying the previous value by 3.
Answer:
12
Step-by-step explanation:
The two unknown values of the triangle have to be the same.
Subtract 28 from 180 and you get 152
So each angle will be 76.
So now, 76 = -8 + 7x
Simplify and 84 = 7x
Now, x is equal to 12
Hope this helped! Please mark me as brainliest if you can!