A polyhedron is formed by intersecting planes. That means that each part of its surface is a vertex, edge, or a flat piece of a plane.
G: the solutions are x=2; x=3; x=-4; and x=-6. None of the answers are the same.
Answer:
36 mph.
Step-by-step explanation:
Let x be the distance to the town hall.
Trip there:
speed (s) = distance / time
s = x / 1.5 so x = 1-5s
Trip back:
s - 12 = x / 2 so x = 2s - 24
AS they are both = to x:
1.5s = 2s - 24
0.5s = 24
s = 48.
Average speed on the way back = 48-12 = 36 mph.
Put it into slope intercept form y=mx+b where m is slope
0=-15-7x+3y
subtract 3y from both sides
-3y=-7x-15
multiply both sides by -1
3y=7x+15
divide both sdies by 3
y=7/3x+5
slope is 7/3
to find a line perpendicular to it, the slope of the other line, when multiplied by this line, must equal -1, exg
1/2 and -2/1 are perpenicular
-1 and 1 are perpendicular
therefor the line perpendicular to it has a slope of -3/7, exg y=-3/7+3
Step-by-step explanation:
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