Idid 5-7, i just need to do 8

pls and you : )

i am awarding extra points

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys