9-4b+(8+7b+5c) what is the answer to this

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle

You are riding your bike and notice the square sign above. you mentally draw a straight line from point a to c. describe the angle relationship between dca and bca