The speed of the current in a creek is 4 mph. A person can kayak 6 mi upstream in the same time that it takes him to kayak 14 mi downstream. What is the speed of the​ person's kayak in still​ water?

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth

Can anyone explain to me how to do this? anything will .