Math question help me plzz i’ll give you brainliest

What is the value of x? enter your answer in the box. (cm)

Average acceleration: i have no idea how to do this.

Which statements about the system are true? check all that apply. y =1/3 x – 4 3y – x = –7 the system has one solution. the system consists of parallel lines. both lines have the same slope. both lines have the same y–intercept. the equations represent the same line. the lines intersect.