Answer:
sqrt(882) or 29.698
Step-by-step explanation:
AD^2 + DC^2 = AC^2
sqrt(21^2+21^2) = 29.698
10+9 x 8 = 100+50+2 (152)
Since you are not allowed to draw a black marble, then you have only 7 ways to draw either a blue or a red marble. The sum of all marbles is 10. So the probability of not drawing a black marble is 7/10 and the probability of drawing a red marble is 2/10 or 1/5.
38. Is the answer. Go go go!
6 regular triangles meet at vertex to form a regular tessellation.
Answer is D.
Hope it helps!
