Which expressions are polynomials? Select each correct answer.

2 + s

4x^3 + y

x^2 - x squared + 2

y

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

What is the difference between regular convex and concave polygons

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000