n5i7kcpreshaLie n5i7kcpreshaLie 26-04-2017 Mathematics contestada 1. Evaluate 6y^2 if y is -4. 2. Evaluate -4xy if x is 4 and y is -5. 3. Evaluate 8x^2 if x is 3. 4.Simplify 6x^2y + 4xy − 7xy. 5. Simplify 4x^2 + 3xy − 7xy + 2y^2. 6. Multiply (5x^2)(4x). 7. Divide (9x^2) by (3x). 8. Divide (12xy) by (4y^2). 9. Multiply (5)(4x^2). 10. Multiply (3x)(2x^2).