4.3
Given that √2 sin (x +45°) = sin x + cos x
4.3.1 Prove this identity.​

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Need on this geometry question. explain how you did it.

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3