Question

A=y-7
b=y-4
y square=100
if a>0 and b<0
then a+b=?

Answer 1

Answer:

y=10

A = 10-7 =3

B=10-4= 6

a+b =6+3 =9

Answer 2

Step-by-step explanation:

y^2=100

y=10

A=y-7

put y= 10

A=10-7=3

B=y-4

B=10-4=6

Now

a+b=3+6=9