Explain why the trinomial x^2+3x+5 cannot br represented as a rectangle.

What should be done to solve the equation? x+14=21 add 14 to both sides of the equation. subtract 14 from the left side of the equation. add 14 to the left side and subtract 14 from the right side of the equation. subtract 14 from both sides of the equation.

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?