Answer:
you have to figure out the number for X because X could be any number
Step-by-step explanation:
Answer:
8
Step-by-step explanation:
<em><u>The equation to find the length r of the red ribbon is:</u></em>

<em><u>Solution:</u></em>
Let "b" be the length of blue ribbon
Let "r" be the length of red ribbon
To find: equation for length r of the red ribbon.
The length of the blue ribbon is two - thirds the length of the red ribbon
Which means,

Therefore,

Thus the equation to find the length r of the red ribbon is found
Answer:
169/4
Step-by-step explanation:
Take the coefficient of the x term. Here it's -13. Now halve that, obtaining -13/2. Finally, square this result. We get 169/4. This is the desired number.
x^2 - 13x + 169/4 - 169/4 + 14 = 0