A 9-pack of plastic cups costs $7.83. What is the unit price?
1 answer:
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ANSWER
EXPLANATION
The law of cosine is given by the formula:
From the diagram,
a=17, b=8, c=16
We substitute the given values into the formula to obtain:
EXPLANATION
The law of cosine is given by the formula:
From the diagram,
a=17, b=8, c=16
We substitute the given values into the formula to obtain:
It is a bit tedious to write 6 equations, but it is a straightforward process to substitute the given point values into the form provided.
For segment ab. (x1, y1) = (1, 1); (x2, y2) = (3, 4).
... x = 1 + t(3-1)
... y = 1 + t(4-1)
ab = {x=1+2t, y=1+3t}
For segment bc. (x1, y1) = (3, 4); (x2, y2) = (1, 7).
... x = 3 + t(1-3)
... y = 4 + t(7-4)
bc = {x=3-2t, y=4+3t}
For segment ca. (x1, y1) = (1, 7); (x2, y2) = (1, 1).
... x = 1 + t(1-1)
... y = 7 + t(1-7)
ca = {x=1, y=7-6t}
