<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
10 squared plus 18 squared equals C squared is the set up
After solving you should get 20.59
I think you would go like this: If 15 covers 5 inches then I know I am going to need at least 30 but I have 3 more spaces so I have to divide 5/15 (That is 15 divided by 5) The answer is 3 so I have to go 3 x 3 which is 9 and then I add
9 to 30 which is 39 so there is my answer. If I did it incorrect please tell me. :). I hope it helps.
Answer:
-12
Step-by-step explanation:
4y=4*(-3) 4*(-3)=-12
Got two types of info here $ and #buttons
Line them accordingly and then cross multiply
a.
$18/12 dozen buttons =
$ x /4 dozen buttons
X= 4•18/12= $6
b.
$18/12 dozen buttons =
$ x/50 dozen buttons
X=18•50/12= $75
c.
$18/12 dozen buttons =
$27/x dozen buttons
X=27•12/18=18 dozen buttons