David and Mark are marking papers each set takes David 61 minutes and Mark 1 hour express the times David and Mark take as a ratio in its simplest form

The system of equations graphed below has how many solutions?

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

`if you have a set of parallel lines a and b cut by transversal x, if angle 1 = 167 degrees, what is angle 4 and why. also what is the measure of angle 5 and why? you need to use the names of the angle relationship and explain. ''.