Simplify.

1. 5√6 - √24

A: 3√6

2. Evaluate 3y + 5xy - x for x = 4 and y = 2

A: 42

3. Simplify 3x(5y + 4) - 2xy - 10x + 6x^2

A: 3xy + 2x + 6x^2

4. Evaluate 5^-3

A: 1/125

5. Simplify ((-2x^4y^7)/(x^5))^3. Assume all variables are nonzero.

A: (2x^3)/(y^21)

1 answer

#3: Typo? I get 13xy
#5:

-2x^4y^7 / x^5 = -2y^7/x
Now cube that. And watch that - sign