Are the following polynomials? 1. f (x) = 2x3 + 5x2 + 4x + 8
2. f (x) = 2x2 + 1-1
3. f(x) = 5 - 2 + 723 - 22
4. f (x) = ſæ2 – x4 +5 + 8x
5. f(x) = 2/3
6. f(x) = m + - 2

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?

Find two numbers if their sum is 91 and the ratio is 6: 7?

Find the root(s) of f (x) = (x- 6)2(x + 2)2.