What is twenty five percent of six thousand

Simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2 . (1 point) 2 square root of 8 8 square root of 2 8 square root of 6 6 square root of 8

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

What expression is equivalent to 42x-56y