Answer:
![\{4,-4\}](https://tex.z-dn.net/?f=%5C%7B4%2C-4%5C%7D)
Step-by-step explanation:
![~~~~x^2 = 16\\\\\implies x = \pm\sqrt{16}\\\\\implies x =\pm 4\\\\\implies x = 4 ,~ x = -4](https://tex.z-dn.net/?f=~~~~x%5E2%20%3D%2016%5C%5C%5C%5C%5Cimplies%20x%20%3D%20%5Cpm%5Csqrt%7B16%7D%5C%5C%5C%5C%5Cimplies%20x%20%3D%5Cpm%204%5C%5C%5C%5C%5Cimplies%20x%20%3D%204%20%2C~%20x%20%3D%20-4)
Answer:
60.
Step-by-step explanation:
I can't see the question above this and what information it gives, but If I'm not mistaken, that shape is a rectangle, so regardless of whether there's a piece of the last side missing, the sides across from each other are congruent in size.
So if the top is 14, then the bottom is 14, and since the left side is 16, then the side missing a piece adds up to 16.
(14*2) + (16*2) =
28 + 32 = 60.
Answer:
12 mouthpieces, 24 reeds, 6 neck straps
Step-by-step explanation:
42 objects - 12 mouthpieces
= 30 objects left consisting of reeds and neckstraps
4 times as many reeds as neckstraps
think of it as 5 groups, 4 are reeds and 1 of nexkstraps
so divide 30 by 5 to get 6 per part.
4 of those parts = 24
1 of the parts = 6
so reeds = 24
neckstraps is 6
mouthpieces = 12
The arrangement of the Eastern and Western lighthouses and the position of the boat are as shown in the attached diagram.
Using sine rule,
28/Sin 37 = 40/Sin B => Sin B = (40 Sin 37)/28 = 0.8597 => B = Sin ^-1(0.8597) = 59.287°
Therefore,
Angle E = 180 - (37+59.287) = 83.713°
Using the sine rule again;
BW/Sin E = 28/Sin 37 => BW = (28 Sin 83.713)/Sin 37 = 46.246 ≈ 46.27 miles.
The boat is 46.27 miles from the western lighthouse. The correct answer is A.
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80 three-digit numbers
(just to make sure, check)