Find all real solutions of the equation, approximating when necessary.
x3 + 4x² + 10x + 15 = 0

In the diagram below, tan θ = sqrt 3. what is the value of m?

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

What is the value of x in the equation 2(x-4) = 4(2x + 1)?