Which of the following words correctly describe a triangle with two 45 degree angles

Solve the system. -a+4b+2c=-8 3a+b-4c=9 b=-1 a.(0,11) ,-1,2) c.(1,1,-2) d.(2,-1,-1)

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d? are he re