Answer:
C. 6.736
Step-by-step explanation:
The unmarked angle is 180-80-40 = 60 degrees. Given the angles of the triangle and one side length there is enough information to use the Law of Sines to solve the triangle--eliminating choice D.
The angle opposite x is larger than the angle opposite 5, so <em>x will be larger than 5</em>. That leaves only answer choice C: 6.736.
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If you want to actually use the law of sines to determine x, you know that ...
x / sin(60°) = 5 / sin(40°)
x = 5·sin(60°)/sin(40°) . . . . . . multiply by sin(60°)
x ≈ 6.736
We are given 4 points.
Using this, we can make an equation.
I got 
by using the slope formula.
So the equation we have is
Now, we can solve for how much peanut butter is used to make 25 packages by plugging in 25 for 
, which is the number of cracker packages.
We need to use 
teaspoons of peanut butter to make 25 packages of crackers.
Hope this helps.
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Answer: The second period class has the greater first quartile.
