B(n)=-1(2)n-1 what's the 5th term in the sequence

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

Which of the following circles have their centers in the third quadrant?

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?