Answer:
A,D,F
Step-by-step explanation:
Im not sure, but i think these are the answers
1. Check the picture attached. Consider the half of the 8-sided die, that is the pyramid ABCDE:
2. The perimeter of the base is 6, so each side of the base is 6/4=3/2
3. The distance between the tallest points is 2 cm, si the height of Pyramid ABCDE is 1 cm.
4. Consider the right triangle EOM in the figure:
EO=1, OM= 3/4 (it is half of AB=3/2) and EM is the hypothenuse, so by the pythagorean theorem length of EM is
![\sqrt{1+ ( \frac{3}{4} )^{2} }= \sqrt{1+ \frac{9}{16} }= \sqrt{ \frac{25}{16} }= \frac{5}{4}](https://tex.z-dn.net/?f=%20%5Csqrt%7B1%2B%20%28%20%5Cfrac%7B3%7D%7B4%7D%20%29%5E%7B2%7D%20%7D%3D%20%20%5Csqrt%7B1%2B%20%5Cfrac%7B9%7D%7B16%7D%20%7D%3D%20%5Csqrt%7B%20%5Cfrac%7B25%7D%7B16%7D%20%7D%3D%20%5Cfrac%7B5%7D%7B4%7D%20%20)
(cm)
5. So side EBC has area
![\frac{1}{2}BC*EM= \frac{1}{2}* \frac{3}{2}* \frac{5}{4}= \frac{15}{16}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7DBC%2AEM%3D%20%20%5Cfrac%7B1%7D%7B2%7D%2A%20%5Cfrac%7B3%7D%7B2%7D%2A%20%5Cfrac%7B5%7D%7B4%7D%3D%20%5Cfrac%7B15%7D%7B16%7D%20%20)
6. The total area is 8*Area(EBC)=
Answer:
3
Step-by-step explanation:
The only one without x
I. ) f ( 3 ) = 36 + 2 = 8
II. ) f ( x ) = ( 3 x - 4 ) / 5
y = ( 3 x - 4 ) / 5
5 y = 3 x - 4
5 y + 4 = 3 x
x = ( 5 y + 4 ) / 3
f-1(x ) = ( 5 x + 4 ) /3
f-1(4) = ( 20 + 4 ) / 3 = 24/3 = 8
III. ) y + 10 = 2 y + 1
- y = - 9
y = 9
Answer: The same result have I. and II.