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elena-14-01-66 [18.8K]
3 years ago
13

Alex stores fertilizer for his farm in a rectangular box. The length of the box is 6 feet, width is 3 inches, and height is 9 in

ches. Each bag of fertilizer contains 0.225 cubic foot of fertilizer. How many bags of fertilizer will fill the box completely?
[1 foot = 12 inches]
Mathematics
1 answer:
Elanso [62]3 years ago
5 0
The volume of the box can be calculated by multiplying all of the dimensions together since this models a rectangular prism.
We convert the width and height into feet. The length of the box is 6 feet, the width of the box is 3 in * 1 ft/12 in = 0.25 feet, and the height is 9 in * 1 ft/12 in = 0.75 ft.
                     volume box = 6 * 0.25 * 0.75 = 1.125 ft^3
We divide the volume of the box by the volume of fertilizer in each bag.
                     number of bags = 1.125 ft^3/0.225 ft^3
                                                 = 5 bags
The answer to this question is it will take 5 bags of fertilizer.
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To solve the system of equations \begin{bmatrix}y=0.5x+3.5\\ y=-\frac{2}{3}x+\frac{1}{3}\end{bmatrix} you must:

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\mathrm{Isolate}\:x\:\mathrm{for}\:-\frac{2}{3}x+\frac{1}{3}=\frac{1}{2}x+\frac{7}{2}\\\\-\frac{2}{3}x=\frac{19}{6}+\frac{1}{2}x\\\\-\frac{7}{6}x=\frac{19}{6}\\\\6\left(-\frac{7}{6}x\right)=\frac{19\cdot \:6}{6}\\\\-7x=19\\\\x=-\frac{19}{7}\approx-2.7

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