John mixed cashews and almonds. He bought 4 pounds of almonds for $22. The cost per pound for cashews is 60% more than the cost per pound of almonds.
John bought enough cashews that, when he mixed them with the almonds, the mixture had a value of $6.50 per pound.
Approximately what percent of the mixture, by weight, was cashews?
A) 20%
B) 25%
C) 30%
D) 35%

John bought 4 pounds of almonds for a total cost of $22.

almonds cost 22/4 = $5.50 per lb

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-The cost per pound for cashews is 60% more than the cost per pound for almonds.

1.6*5.5 = $8.80 per lb

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-John bought enough cashews that, when he mixed them with the almonds, the mixture had a value of $6.50 per pound.

Approximately what percent of the mixture, by weight, was cashews?

Equation:

value + value = value

5.5a + 8.8c = 6.50(a+c)

5.5a + 8.8c = 6.5a + 6.5c

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1a = 2.3c

----

c = a/2.3

c = 0.435a

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Total weight = a + c

Total weight = 1.435a

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Percent of cashews = wt of cashews/total weight

Percent of cashews = 0.435a/1.435a = 38.3%

So, we simplify that...

It will be C) 30℅

Also, tell me if I'm wrong...

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

answer: 140

step-by-step explanation:

so just add all then it will be your answer but i am not pretty sur eif it is but hope this i am here to people