What’s the answer to 10-(-6)

What is the point-slope form of the equation for the line with a slope of -2 that passes through (1,4)?

Find the value of x for which the lines are parallel.

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second