Answer:
1) 2 1/4 + 5 1/2 + 1/4 = 8
2) 9 1/2 - 3 1/2 = 6
3) 7 x 13 = 91
4) 17 / 2 = 8 1/2
Step-by-step explanation:
Answer:
(E) 1
Step-by-step explanation:
2r+ (2r+3 ) < 11
Combine like terms
4r+3 < 11
Subtract 3 from each side
4r +3-3 < 11-3
4r < 8
Divide each side by 4
4r/4 < 8/4
r <2
The only possible choice is 1
The equation of a parabola in vertex form, is:

Where <em>(h,k)</em> are the coordinates of the vertex.
From the given graph, notice that the coordinates of the vertex are:

The roots are the values of <em>x</em> where the graph crosses the x-axis. In this case, the graph crosses the x-axis at the points <em>(4,0)</em> and <em>(6,0).</em> Then, the roots are:

Substitute the values of the vertex into the equation of the parabola in vertex form:

To find the value of <em>a</em>, substitute <em>(x,y)=(4,0)</em>:

Therefore, the equation of the parabola is:
Answer:
B
Step-by-step explanation: