Please help!! Prove that the perimeter of a regular n-sided polygon can be found using the formula P=2rnsin(180°/n) where r is the radius of the circumscribing circle. Thank you

Which of the binomials below is a factor of this trinominal? x^2-13+30

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps