Question

consider the function f(x) =root x and g(x)=7x+b. in the standard (x,y)cordinate plane,y=f(g(x) passes through (4,6). what is value of b

Answer 1

f(x)=√x               g(x)=7x + b
y = f (g(x) ) = √[7x + b]

y² = 7 x +b     passes  thru  (4,6)...
6² = 7 *4 + b
=>  b = 8