Umm so guys my teacher said im dumb because i said 1+1 was 21 :( prove her wrong

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

Is the square root of 4 plus the square root of 16 rational?

Which value would be a solution for x in the inequality 47-4x< 7