Rewrite r=2.5 sin(theta) in rectangular form.

a) x^2+y^2+0.4y=0
b)x^2-y^2+5y=0
c)x^2+y^2-6.25y=0
d)x^2+y^2-2.5y=0

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

What is the square root of 45? (step by step working plz)

In the triangles, tr = ge and sr = fe. if = 3.2 ft, which is a possible measure of ? 1.6 ft 3.0 ft 3.2 ft 4.0 ft