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My name is Ann [436]
3 years ago
7

Sharko had $294. After spending $24.20 on a plate of pasta, $5.05 on a slushie and giving $59.45 to his sister, he had twice as

much money as his sister. How much money did his sister have at first?
Mathematics
1 answer:
siniylev [52]3 years ago
3 0

Answer:

$43.20

Step-by-step explanation:

He had $294 at first then he spent $24.20 on a plate of pasta, $5.05 on a slushie and gave $59.45 to his sister

so the money left is

294 - 24.20 - 5.05 - 59.45 = 205.3 this is twice of what his sister has so the sister has 102.65

102.65 - 59.45 = 43.20 is the money ahe had at first

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Substitute the values for a, b, and c into b2 – 4ac to determine the discriminant. Which quadratic equations will have two real
garik1379 [7]

The complete question is

"Substitute the values for a, b, and c into b2 – 4ac to determine the discriminant. Which quadratic equations will have two real number solutions? (The related quadratic function will have two x-intercepts.) Check all that apply.

0 = 2x^2 – 7x – 9

0 = 4x^ 2 – 3x – 1

The quadratic equations that have real number solutions are; 4x^2 – 3x – 1, and 2x^2 – 7x – 9.

<h3>What is the formula for Discriminant?</h3>

The formula for finding the discriminant is

b^2 - 4ac

The solution contains the term \sqrt{b^2 - 4ac} which will be:

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Non-real and distinct roots if the discriminant is negative

For the quadratic equation 2x^2 - 7x - 9

b^2 - 4ac

= (-7) ^2 - 4( 2) ( -9)\\\\= 49 + 72 = 121

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For the quadratic equation 4x^ 2 - 3x- 1

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This equation will have two real number solutions.

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2 years ago
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Do the same with the y-axis except look up and down instead of left and right. so the numbers are 6 and -3. Use the same method above. this is set builder notation.

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