State the order of the given ordinary differential equation.
(1 − x)y'' − 7xy' + 5y = cos x

determine whether the equation is linear or nonlinear by matching it with (6) in section 1.1.

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Arecipe calls for 32 fluid ounces of heavy cream.how many 1 pint containers of heavy cream are needed to make the recipe?

What does independent variable and dependent variable mean in math?