The answer is f(x)=x²+2x when evaluated with -3 gives you the value of 3
If I get this it should be, 25 x 12 = 300, think it as 4 x 25 is 100 so you need 3 x 100, so 4 x 3 is 12, 25 x 12 =12, hope this helps
3/8x=6.
x=6*8/3.
x=2*8.
x=16.
Nicole started with 16 feet of string.