I need help with this question, i am not exactly sure how to do it, help is veryy much appreciated

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.

Who long does it take to drive 150 miles at 45 miles per hour