Solve for x.

x + 47 = -23
x =

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

And employees salary increase by $4500 which represents a 15% raise what is the employees new salary

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is