Try using the shortcut for the derivative of a polynomial and then substitute the value of the variable. if f(x) = 2x2+2, then what is the slope of f(x) at x = 7?

Ihave a 69 and an 82. the 69 is worth 40% of my grade and the 82 is worth 15%. can someone tell me my current average grade.

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.

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?