Answer:
7.
lateral surface area of traingular prism=perimeter of traingle ×length=[5+3+4]×6=72cm²
curved surface area=2[area oftraingle]=2×1/2×4×3
=12cm²
now
total surface area=72cm²+12cm²=84cm²
8.
volume of traingular prism=area of traingle ×length
=1/2×12×3.4×4=81.6cm³
6/10 can be simplified but we don't need to worry about it right now. We only need to worry about simplifying 20/100:
20/100 → 10/50 → 5/25 → 1/5
Find common denominators
1/5 → 2/10
6/10
Now, add.
6/10 + 2/10 = 8/10
Therefore, the equation is true.
Best of Luck!
It looks like you've got six numbers lined up there, every one of them is the same number, and you need to have them added up.
Well, you've got (-6) listed six ==> <em>TIMES</em> <== , so the situation is the same as if you just wrote
6 x (-6)
and that's just <em>-36 </em>.
You would need to subtract 18 to both sides to make this a perfect-square trinominal.
x^2 - 12x = 18
x^2 - 12x - 18 = 0
a = 1
b = -12
c = -18
Best of Luck!
4/6 cuz 2 times 2 = 4 and 3 times 2 = 6
