What’s the midpoint of (9,10) and (-9,-10)

What value of x is in the solution set of 4x – 12 s 16 + 8x?

Consider the linear function that is represented by the equation y= 4x+5

$30 to spend on dinner tax and gratuity at mos restaurant rax is 6% and they give a 15% tip on the total bill after taxes thier dinner cost $21 which statement correctly explains wether andrew and kate have enough money to pay their bill