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nalin [4]
3 years ago
13

James spent $(2y2 + 6). He bought notebooks that each cost $(y2 − 1). The expression to find the number of notebooks James bough

t is . If y = 3, James bought notebooks. NextReset
Mathematics
1 answer:
navik [9.2K]3 years ago
5 0
The first thing you should do is to<span> divide the total cost by the unit cost you have got: </span><span>(2y^2 + 6) / (y^2 - 1) </span>
Then just use simple math by plugging in the value y=3
(2*3²+6): (3²-1)=  24:8 = 3 which is the nubmer of the bought notebooks. 

<span>In total he spent $24 on notebooks that cost $8.</span>
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<em>Comment on maximum volume, minimum area</em>

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If the box has a <em>closed top</em>, then each pair of opposite sides will have the same cost for a maximum-volume box. If costs are uniform, the box is a cube.

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