If 81x^2 + 126x + b is a perfect square what is the value of a? (Just enter the value)

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

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