This literally looks like a foreign language to me, can someone help me please

If f(x) = 4 - x2 and g(x) = 6x, which expression is equivalent to (g-f)(3)? 06-3-(4 + 3)2 06-3-(4-33 6(3) - 4 +32 6(3) -4 -32

During a wright loss challenge your friend goes from 125 pounds to 100 pounds.what was the percent weight loss

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?