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kow [346]
3 years ago
7

Danielle works as a cashier in a bookstore she works 35 hours a week and orange $11 an hour each week Daniel spend $300 and save

the rest Daniel estimated that she earns about $20,000 per year is this estimate accurate explain
Mathematics
2 answers:
exis [7]3 years ago
6 0
 Her estimate is not accurate because if you multiply 30 by 11 you would get 330. Then you multiply that by 52and you would get $10560 a year.
LuckyWell [14K]3 years ago
5 0
So just estimate. Say she earns 10 dollars an hour instead of 11, and then just multiply 35 by 10. That would equal 350. Then, she spends 300 dollars. Then she's left with 50 dollars. Since there are around 50 weeks in a year, you can just multiply 50 by 50, to get 2500. So no, her estimate is not accurate.
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Explanation:

The inequality sign has an "or equal to", which means the boundary line will be solid. We can rule out choices B and C because they have dashed boundary lines.

A solid boundary line means that points on the boundary are part of the solution set.

Now let's see what happens when we plug in a point like (x,y) = (4,0). This will tell us how to shade the blue region.

-5x + 4y \ge -1 \\\\-5(4) + 4(0) \ge -1 \\\\-20 \ge -1 \\\\

This is false because -20 is not larger than -1. It's the other way around.

This tells us the point (4,0) is not in the blue shaded region, and it's not on the boundary line either. We can rule out choice A because of this.

The only thing left is choice D, which is the final answer. I recommend plugging a point from this region into the inequality to confirm we have a true statement.

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3 years ago
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prisoha [69]

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<h2 /><h2>Area = length²</h2><h2 />

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16x² + 9 - 24x

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The area  of square in terms of x = 16x² -24x + 9

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2 years ago
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