Question

plz solve this question as fast as possible​

Answer 1

y^2 = 100  therefore, y = +10 or -10  .  as a>0  a= y-7  a=10-7=3  a=3                                        as b<0  -10 - 4 = -14.  b= -14   a + b = 3 + (-14) = 3-14 = -11     a + b = -11   ans: -11

Answer 2

ANSWER:

a+b= -11

answer:      -11