Which polynomial expressions are in standard form? a. x^2 - x-72 b. (x+3)(x-7)c.-8x+56d. 5e.5x(2x)

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

Is the square root of 4 plus the square root of 16 rational?

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be