Please help their rest of the questions: how to multiply the both sides of the lowest common multiple of C, D, and the rest of the questions for question number 3. And question number 4 (Equation with 2 or more unknown numbers: Use the cross multiplication to find a in each equation. 50 points if you guys answer quickly! :)

What is the smallest integer n such that n\sqrt{2} is greater than 20

Drag each expression to the correct location on the solution. not all expressions will be used. consider the polynomial 8x + 2x2 - 20x - 5. factor by grouping to write the polynomial in factored form.

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4