What is the relationship between a and b? last answer is none of the above!

Mathematics

2 answers:

Zolol [24]4 years ago

8 0

Answer:

B) Complementary angles

Step-by-step explanation:

∠AXB + ∠CXB = 180 { Straight line}

∠AXB + 90 = 180 { given ∠CXB=90}

∠AXB = 180 - 90

∠AXB = 90

a + b = 90

If sum of two angles is 90, then the two angles are complementary angles.

LUCKY_DIMON [66]4 years ago

7 0

Answer:

its B I think. because it should equal 90°

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sergey [27]

Answer:

Step-by-step explanation:

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3 years ago

A researcher surveyed 80 adults and found that 22 regularly run for exercise and 18 regularly swim for exercise.

Aliun [14]

Whenever the questions asks for the probability and has "or" you have to add the two probabilities. In the same way, "and" implies multiplication. Therefore, the probability that someone swims is:
$\frac{18}{80} = \frac{9}{40}$

Probability that someone runs:
$\frac{22}{80} = \frac{11}{40}$

Thus, if you add them:
$\frac{9}{40} + \frac{11}{40} = \frac{20}{40} = \frac{1}{2}$

So, the probability that someone swims <em>or</em> runs is 1/2 or 50%.

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3 years ago

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Mnenie [13.5K]

My guess is the bottom right.

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3 years ago

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