Answer:
Step-by-step explanation:
y = kx
400 = kr . . . . . . (1)
also, r = 4k . . . .(2)
400 = k(4k) = 4k^2
k^2 = 400/4 = 100
k = sqrt(100) = 10
X=20
WORK:
100+ 3x +x=180
4x+100=180
-100 -100
4x=80
divide both sides by 4
x=20
Answer:
77
Step-by-step explanation:
Hope this helps..
Good luck.
Answer:
City A, City C
Step-by-step explanation:
They are all below -3 degrees Celsius
For this case we have that by definition, the equation of a line in the slope-intersection form is given by:

Where:
m: It's the slope
b: It is the cutoff point with the y axis
We find the slope with the given points:

Thus, the line is given by:

We substitute a point to find "b":

Finally, the equation is:

Answer:
