Answer:
12 = 0
Step-by-step explanation:
Substitute the given value into the function and evaluate.
−
2
x
2
y
=
x
=
−
3
=
y
=
−
1
−
12
=
=
−
13
18
−
18
=
0
12
=
0
Answer:
B
Step-by-step explanation:
The difference between each term is six and the numbers are increasing so the only one that is in the correct format, which is an = a1 + (n-1)d, is B
please give Brainliest
Let us call the rate as velocity. Now the velocities of the plane and of the wind are:
and
:
Now
case 1:
case 2:
from equation 2:
substitute in equation 1:
Which is your velocity in still air (without wind)
Substituting back in:
you get:
which is the wind velocity
24 percent of the land in the Northern Hemisphere has permafrost underneath it (Figure 1). So, permafrost makes up 23 million square kilometers (9 million square miles). Large expanses of permafrost occur in Siberia, the Tibetan Plateau, Alaska, the Canadian Arctic, and other higher mountain regions.