I hate word problems I need help here. If you can explain how to get the answers I would appreciate it.

If c is zero of the linear function defined by f(x)=mx+b, m not eqaul to 0, then the point at which the graph intersects the x-axis has coordinates (__ ,__).

Is this 0, any sets of real numbers ?

If you were asked to solve 2x+3=4x-12 by the x-intercept method, why would you not get the correct answer by graphing y1= 2x+3 – 4x -12.

I know this has to be analytically broken down. You need the y2 to graph it.? Can anyone word this better?

Suppose two acid solutions are mixed. One is 26% acid and the other is 32% acid. Which one of the following concentrations cannot possibly be the concentration of the mixture? A. 36% B. 28% C.30% D.31%

I have no clue. I'm going to guess and say A.

Suppose that a computer that originally sold for x dollars has been discounted 30%. Which one of the following expressions does not represent the sale price of the computer? A. x – 0.30x B. 0.70x C. 7/10x D. x – 0.30

I'm just going to guess here and say D. because the coefficient needs a variable?

At 2:00PM a runner heads north on a highway, jogging at 10 miles per hour. At 2:30PM a driver heads north on the same highway to pick up the runner. If the car travels at 55 miles per hour, how long will it take the driver to catch the runner?

How should I formulate this to figure it out?