Which equations are equivalent to the given equation?
49= -7k
a) 49/(-7)=(-7)/(-7)
b) 49*(-7)=-7k/(-7)
c) 49*(-1/7) (=-7k*(-7)
d) 49* (-1/7) = -7k*(-1/7) c& d the 1/7 are fractions

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

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 =

Does the point (1, sqrt 7) lie on circle shown.