Me and tell me the ancer to the number too

Measures of the angle of r, 31 s (x+4) t (3x+9)

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

What is the remainder when 3x^2-x-10 is divided by x-1 -6,-7,-8, or -9