2) —30x®y102 + 24xy" – 9x?у? - 21xy​

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

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?

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?