Not exactly sure how I got this wrong, I selected 60 degrees. If you figure out how they got another answer please give a detailed explanation for the points!

Write two subtraction equations that are equivalent to 5 + 12 = 17.

The tile along the edge of a triangular community pool needs to be replaced? ?

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?