Madelyn wanted to learn what sorts of things around the house are magnetic. She took a magnet around and touched it to many things to see if it tried to stick. Here are the items she tried and what she found. What can Madelyn conclude from the above results? A. All silver objects are magnetic. B. Not all metals are magnetic. C. All magnetic metals are silver. D. All metals are magnetic.

b.

Explanation:

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m∠A = 58°

Step-by-step explanation:

In ΔABC,

m∠BAC = (x + 63)°

m∠ABC = (x + 96)° [Vertically opposite angles]

m∠ACB = (180° - 149°)

             = 31°

By triangle sum theorem,

m∠ABC + m∠ACB + m∠BAC = 180°

(x + 96) + 31 + (x + 63) = 180°

2x + 190 = 180

2x = -10

x = -5

Therefore, measure angle A = (x + 63)

                                               = -5 + 63

                                               = 58°