9 of them.
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To find the measure of angle ABD, you can add the measures of angles ABC and CBD since they share a ray. Therefore, the measure of angle ABD is 40° + 23° = 63°. Thus, the measure of angle ABD is 63 degrees.
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No, only for irrational numbers. Actually, that's not true. Take any two rationals, a/b and c/d where a,b,c,d are integers and b,d are nonzero. The average of a/b and c/d is (ad+bc)/2bd. This is a rational number between a/b and c/d. Now take the average of this new number and the first number. This gives you: (2abd+abd+cb^2)/(2db^2) which is rational and also between the first and third number. We could carry on this process ad infinitum. We would then have an infinite collection of numbers between a/b and c/d. Hence the answer is yes.
82 its simple math
One was 5 one was 6 abd one was 7