<u>Answer:</u>
The answer is B -->
<u>How I got that:</u>
<u />
These are really easy, you're simply looking for numbers that you can factor down. Like here:
I took:
and saw that I could factor out 4 from the denominator:
and then I canceled out the common factor (4 because its on both sides):
And there ya go!
<em>~That's All Folks~</em>
<em>-Siascon</em>
Since you're painting the sides of the cube, you will need the equation for the surface area of a cube, which is
, where SA = surface area and s = length of an edge of the cube.
You're told that the edge length, s = 2cm. Plug this into the equation for surface area:
The surface area that will be painted is <span>
24 cm².</span>
Answer: Line AC = 36
Step-by-step explanation: The first and most important clue is the fact that points B, D and F are midpoints of the triangle ACE. What this tells us is that point B divides line AC into two equal sides. Likewise points D and F. If point D divides line EC into two equal sides, then line ED equals
39/2 = 19.5
Also, triangle FED is similar to triangle AEC. Since ED is half of EC, and FE is half of AE. Therefore in triangles FED and AEC,
FD/ED = AC/EC
18/19.5 = AC/39
By cross multiplication we now have
(18 x 39)/19.5 = AC
702/19.5 = AC
36 = AC
Therefore line AC = 36