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kherson [118]
3 years ago
5

The percent of working students increased 12.2% to 32.9%, what was the percent prior to the increase?

Mathematics
1 answer:
Cloud [144]3 years ago
5 0

Answer:

20.7%

Step-by-step explanation:

Simply subtract 12.2 from 32.9 (32.9 - 12.2 = 20.7).

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How many bags of each cookie did Stephanie sell? How many total bags of cookies did she sell
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The owner of a small store buys coats for ​$60.00 each. she sells the coats for ​$ 72.00 each. What percent of the purchase pric
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3 0
3 years ago
4x2 + 9y2 = 72<br> 2x - y = 4<br><br> Which of the following is a solution to the system shown?
Ede4ka [16]
If you would like to solve the system of equations, you can do this using the following steps:

4x^2 + 9y^2 = 72
2x - y = 4 ... 2x - 4 = y
_________
<span>4x^2 + 9y^2 = 72
</span><span>4x^2 + 9 * (2x - 4)^2 = 72
</span>4x^2 + 9 * (4x^2 - 16x + 16) = 72
4x^2 + 36x^2 - 144x + 144 = 72
40x^2 - 144x + 144 - 72 = 0
40x^2 - 144x + 72 = 0
10x^2 - 36x + 18 = 0
5x^2 - 18x + 9 = 0
(5x - 3) * (x - 3) = 0
1. 5x - 3 = 0 ... 5x = 3 ... x = 3/5
2. x = 3

<span>1. y = 2x - 4 = 2 * 3/5 - 4 = 6/5 - 20/5 = -14/5
2. y = 2x - 4 = 2 * 3 - 4 = 6 - 4 = 2

1. (x, y) = (3/5, -14/5)
2. (x, y) = (3, 2)

The correct result would be </span>(3/5, -14/5) and <span>(3, 2).</span>
5 0
3 years ago
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