In the Baroque period, how many melodies did a piece of music usually feature

Which of the functions graphed below has a removable discontinuity?

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.

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.