5p+6=-4-8 im having a difficult time with this equation

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.