Answer:
C.0
since it's literally impossible for a triangle to have a right angle only squares and other shapes. triangles are made of acute angles
The answer to your question is 9,9
They can ride their bike 12 miles because in 6 minutes they ride 0.8 miles so in 1.5 hours they ride 12 miles. 0.8 * 10 = 8 miles 1 hour so 0.8 * 5 = 4 miles 0.5 hours 8 miles + 4 miles =12 miles 1 hour + 0.5 hours = 1.5 hours
Without further info, like distances
check the picture
Answer: 3 cofficients are there ( 5, 2, and 6).