The function f is given by f (x) = x2 + 2x. Which statement is true about the graph of f?
The graph has a y-intercept at (0,0)
The graph of the function opens upward
The x-intercepts are at (0,0) and (2,0)
The coordinates of the vertex are (1, -1).
The coordinates of the vertex are (-1, -1).

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

susie has 7 apples

ratio is 2 : 9

the answer is three

13.5 : 3