X=- 3/2 i believe because if the square root is x-3 you would replace it with them, but that's what i think.
Answer:
ln (
−
15
d^3 v
e
by
)
Step-by-step explanation:
<span>p=<span><span>2l</span>+<span>2w</span></span></span>Step 1: Flip the equation.<span><span><span>2l</span>+<span>2w</span></span>=p</span>Step 2: Add -2w to both sides.<span><span><span><span>2l</span>+<span>2w</span></span>+<span>−<span>2w</span></span></span>=<span>p+<span>−<span>2w</span></span></span></span><span><span>2l</span>=<span>p−<span>2w</span></span></span>Step 3: Divide both sides by 2.<span><span><span><span><span>2l</span>2</span></span></span>=<span><span><span><span>p−<span>2w</span></span>2</span></span></span></span><span>l=<span><span><span><span>12</span></span>p</span>−<span>w</span></span></span>
Answer:
Heptagon = 84 ft²
Octagon = 186 yd²
Triangle = 48√3 m²
Step-by-step explanation:
where:
= length of apothem
= perimeter
<u>Heptagon</u>
a = 5.0 ft
p = 33.6 ft
⇒ area = 1/2 x 5.0 x 33.6 = 84 ft²
<u>Octagon</u>
a = 7.5 yd
p = 8 x 6.2 = 49.6 yd
⇒ area = 1/2 x 7.5 x 49.6 = 186 yd²
<u>Triangle</u>
Formula for the apothem of an equilateral triangle :
where 
= side length
a = 4, so:
Now we know the side length, we can calculate the perimeter (p):
p = 3 x 8√3 = 24√3
⇒ area = 1/2 x 4 x 24√3 = 48√3 m²
