Whats's the difference between -6 and 6 on the number line?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

The total number of dental clinics total for the last 12 months was recorded

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.