X+y=20 3x-3y=30 which values of x and y satisfy this system of equations?

What is the quadric regression equation that fits these data

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

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52