Answer:
I would say B
Step-by-step explanation:
when you are going down you tend to go faster because of gravity. So you would go down, up, down, up, and a little down. This would make B the answer because the speed is increasing when it goes down so that is the only answer that would make sense. Hope this helped! Have a good day! :)
Answer:
x + 2x + (2x - 4) = 81
And x( side EF) was found out to be 17 units
Step-by-step explanation:
The perimeter of a triangle is a+b+c where a,b and c are the side lenghts of the triangle.
The question here says that side DE is twice the lenght if side EF.
Now let's assume that the length of side EF to be x,then the side DE will be 2x.
And the length of side DF is 4 units less than the lenght o side DE.
this means that side DF = 2X - 4
Remember that the perimeter is 81 units
In this case,
x + 2x + (2x - 4) = 81 is the equation that we will use to derive the various lenghts of the triangle
Side EF which x will be
X + 2x + (2x - 4) = 81
5x - 4 = 81
5x = 85
X = 17
Therefore side EF which Is x = 17
Notice the picture below, the perpendicular line from the right-angle,
makes up 3 similar triangles, including the big one containing the small ones
so, you have three similar triangles, one large, a medium and a small one
now, using proportions for those folks, we end up with
solve for "x,y and z"