Which function is equivalent to f(x) = x^2-4x-12?

Ineed asap graph the system of equations 2x+y=5; 14+7y=35

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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