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elena-14-01-66 [18.8K]
3 years ago
7

Find the value of 2. A.126 B.121.5 C.117 D.63

Mathematics
1 answer:
Bezzdna [24]3 years ago
5 0

Answer:

D

Step-by-step explanation:

The tangent- tangent angle x is half the difference of the intercepted arcs.

The sum of the 2 arcs on the circle = 360°, thus

lower arc = 360° - 243° = 117°, then

x = \frac{1}{2} (243 - 117)° = 0.5 × 126° = 63°

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How many ml of a 20% acid mixture and a 80% acid mixture should be mixed to get 120ml of a 35% acid mixture?
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Volume of Mixture A =90 ml

Volume of Mixture B =30 ml

Step-by-step explanation:

Let say, Mixture A + Mixture B = Mixture C

Volume of Mixture A is x

Volume of Mixture B is y

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Acid contain in Mixture B is 80% =0.8y

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