Answer:
Step-by-step explanation:
( a + b )( a - b ) = a² - b²
( 1 + sin x )( 1 - sin x ) = 1² - sin² x = cos² x
Answer:
9
Step-by-step explanation:
DE = AE-AD
= 27-18
= 9
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To do this I must first determine what fraction of the circle is represented by the central angle 30°. Since there are 360° in a full circle, I can find the fraction of a circle by simplifying . The sector<span> represents of the circle. To find the </span>arc length<span>, I now need to find the circumference of the entire circle.
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First, add up all the pencils in the bag: 24 + 15 + 8 = 47 pencils in total.
Next, put the probability into a fraction: The probability of selecting a red pencil is 24/47 and the probability of selecting a blue pencil after is 15/46. 24/47 x 15/46 = 360/2162.
Next, change the fraction into a percent: 360/2162 = 0.166512488 which is 16.6512488%. Round it to the nearest tenth of a percent and you get 16.7%.