If you check and do my work ill make you brainlist

Which is the graph of this function 3 square root of x plus one if

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

A+b= 17, ab=70, find the value of |a-b|