If sin(a+b)=4/3,sin(a-b)=5/13,a+b ,a-b being acute angles prove that tan 2a=63/16.

Evaluate 4 a for a = 5 2/3 . express your answer in simplest form.

Cherie measures and records the lengths and sizes of the same style of a sandal found at a shoe store. which equation can be used to determine the approximate shoe size, s, for a foot length of x inches? s = x – 2 s = 2x – 10 s = x + 6 s = 2x + 4

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?