The law of cosines for rst can be set up as 52 = 72 + 32 – 2(7)(3)cos(s). what could be true about rst?

law of cosines: a2 = b2 + c2 – 2bccos(a)

r = 5 and t = 7
r = 3 and t = 3
s = 7 and t = 5
s = 5 and t = 3

What is the perimeter, p, of a rectangle that has a length of x + 8 and a width of y − 1? p = 2x + 2y + 18 p = 2x + 2y + 14 p = x + y − 9 p = x + y + 7

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $

Acircle has a circumference of 28.36 units what is the diameter of the circle