Use this figure to find value of FOD

Mathematics

2 answers:

rodikova [14]3 years ago

5 0

Line CD is a straight line.
∠COD = 90°

Given that adjacent angles on a straight line add up to 180°,

∠BOD + ∠COD = 180°

∠BOD + 90 = 180

∠BOC = 90°

∠FOD = 90 - 15 - 12 = 63°

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Answer: ∠FOD = 63° (Answer C)
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stepladder [879]3 years ago

4 0

Hey there!

BOD is a 90 degrees angle. Make an equation for that angle. 15+12+x=90. Simplify this to 27+x=90. You need to isolate x, so subtract 27 on each side to get x=63. C is the answer.

I hope this helps!

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The question is incomplete:

What should I buy? A study conducted by a research group in a recent year reported that 57% of cell phone owners used their phones inside a store for guidance on purchasing decisions. A sample of 14 cell phone owners is studied. Round the answers to at least four decimal places. What is the probability that seven or more of them used their phones for guidance on purchasing decisions?

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$P(x=14) = \dbinom{14}{14} p^{14}q^{0}=1*0.0004*1=0.0004\\\\\\$

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