I need help with this. Rewrite the expression with rational exponents as a radical expression.

7 times x to the two thirds power

9 times the cube root of x to the power of 2
7 times the square root of x to the power of 3
cube root of the quantity 9 times x to the power of 2
square root of the quantity 9 times x to the power of 3

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?