=sum(83:87)/2

someone help! i need the answer asap!

What is the equation of the following graph in vertex form? parabolic function going down from the left through the point zero comma twelve and through the point two comma zero and turning at the point four comma negative four and going up through the point six comma zero and continuing towards infinity courtesy of texas instruments a: y = (x − 4)2 − 4 b: y = (x + 4)2 − 4 c: y = (x + 2)2 + 6 d: y = (x + 2)2 + 12

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

What are the exclude value of mn+3m