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pishuonlain [190]
3 years ago
9

ANOTHER ONE PLEASE HELP

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
3 0

Answer:A

Step-by-step explanation:

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Please solve the following quadratic equation and show your work: x^2 -x =30
saveliy_v [14]
Rewriting the equation as a quadratic equation equal to zero:
     x^2 - x - 30 = 0
We need two numbers whose sum is -1 and whose product is -30. In this case, it would have to be 5 and -6. Therefore we can also write our equation in the factored form
     (x + 5)(x - 6) = 0
Now we have a product of two expressions that is equal to zero, which means any x value that makes either (x + 5) or (x - 6) zero will make their product zero.
     x + 5 = 0  => x = -5
     x - 6 = 0  => x = 6
Therefore, our solutions are x = -5 and x = 6.
8 0
3 years ago
Someone please help me
allsm [11]

Answer:

Solutions: x = \frac{-3}{ 4} + i \sqrt{39},  x = \frac{-3}{4} - i \sqrt{39}

Step-by-step explanation:

Given the quadratic equation, 2x² + 3x + 6 = 0, where a =2, b = 3, and c = 6:

Use the <u>quadratic equation</u> and substitute the values for a, b, and c to solve for the solutions:

x = \frac{-b +/- \sqrt{b^{2} - 4ac} }{2a}

x = \frac{-3 +/- \sqrt{3^{2} - 4(2)(6)} }{2(2)}

x = \frac{-3 +/- \sqrt{9- 48} }{4}

x = \frac{-3 +/- \sqrt{-39} }{4}

x = \frac{-3 + i \sqrt{39} }{4}, x = \frac{-3 - i \sqrt{39} }{4}

Therefore, the solutions to the given quadratic equation are:

x = -\frac{3}{ 4} + i \sqrt{39} ,   x = -\frac{3}{4} - i \sqrt{39}

4 0
2 years ago
Seven hamburgers and four sodas cost $27.35. Four hamburgers and five sodas cost $18.75
Doss [256]

Answer:

equations:

7x + 4y = 27.35

4x + 5y = 18.75

Step-by-step explanation:

x = burgers

y = sodas

---------------------------------

7x + 4y = 27.35

4x + 5y = 18.75

5 0
3 years ago
Expand the expression: 2.2(-4k + 1)
evablogger [386]

Answer:

8.8k + 2.2

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Only have a few questions left please help ;-;
QveST [7]

Answer:

Hello! answer: 100

Step-by-step explanation:

25 + 55 = 80 180 - 80 = 109 therefore the answer is 100 HOPE THAT HELPS!

4 0
3 years ago
Read 2 more answers
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