What is the value of (x^3 − 7x^2 − 18x + 42) when x = 3?

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.

Find solution of the linear equation y = 2/3x + 1/3