Can Anyone please solve this? Will mark brainiest!!!!
1 answer:
Answer:
(a) see attached
(b) CD = 29
Step-by-step explanation:
<h3>(a) </h3>See the attachment for a diagram.
In the diagram, we have shown point E on the plane so that BE is parallel to AC.
__
<h3>(b)</h3>Triangle BDE is a right triangle with hypotenuse BD = 25 and leg BE = AC = 15. The length DE is given by the Pythagorean theorem as ...
DE = √(BD^2 -BE^2) = √(625 -225) = 20
Triangle CDE is a right triangle with hypotenuse CD and legs CE = 21 and DE = 20. The length of the hypotenuse is also given by the Pythagorean theorem as ...
CD = √(CE^2 +DE^2) = √(21^2 +20^2) = √841
CD = 29
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Not addition, since 
and 0 doesn't belong to the set.
Not subtraction, since
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It is closed under multiplication. The set appears to contain all non-zero multiples of 3.
Not division, since dividing some of the numbers results in rationals which do not belong to the set.
What other operations are you supposed to consider?
Not subtraction, since
It is closed under multiplication. The set appears to contain all non-zero multiples of 3.
Not division, since dividing some of the numbers results in rationals which do not belong to the set.
What other operations are you supposed to consider?