125/21 = 150/x
cross multiply
125x = 3150
x = 3150/125
x = 25.2 lbs....rounded up = 26 lbs <==
The rule for this one is called the difference of squares
A^2 - b ^2 = (a+b)(a-b)
Using this rule
N^2 - 62 = (n+ sqrt(62)) (n - sqrt(62))
The solution for this one is to make the statement = 0
0 = (n+ sqrt(62)) (n - sqrt(62))
N can either be +- sqrt(62)
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Divide by 2 to get 1/3 of the week:
1/4 / 2 = 1/8
Multiply by 3 to get the full week:
1/8 x 3 = 3/8
Thus your answer is B. 3/8
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C . Parabola that opens to the left
