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drek231 [11]
2 years ago
11

Can someone help me pls

Mathematics
1 answer:
irina [24]2 years ago
3 0

Answer:

  (d)  x = (5±√53)/2

Step-by-step explanation:

The given quadratic equation is in standard form, so the coefficients are readily identified. The solution is given by the quadratic formula based on those coefficients.

<h3>Quadratic formula</h3>

The solution to the quadratic equation ax² +bx +c = 0 is given by the formula ...

  x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}

<h3>Application</h3>

The given equation has coefficients a = 1, b = -5, c = -7, so the solutions given by the formula are ...

  x=\dfrac{-(-5)\pm\sqrt{(-5)^2-4(1)(-7)}}{2(1)}=\dfrac{5\pm\sqrt{25+28}}{2}\\\\\boxed{x=\dfrac{5\pm\sqrt{53}}{2}}

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When a die is rolled, what is the theoretical probability that number five will be rolled? <br><br>​
Marta_Voda [28]

Answer: 1/6

Step-by-step explanation: there is 6 faces on a standard die, one of them is 5.

7 0
1 year ago
Ubehebe crater in Death Vally has a diameter of a little more than 1/2 mile. If latisha walks around its rim at a rate of 2 mile
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r=0.25 miles
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3 years ago
Find an equation for the line with the given properties. Perpendicular to the line 7x - 3y = 68; containing the point (8, -8)
Sever21 [200]

Answer:

y=\dfrac{-3}{7}x-\dfrac{32}{7}

Step-by-step explanation:

Given that,

A line 7x - 3y = 68 and containing the point (8, -8).

The equation can be written as :

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The slope is :7/3

Line is perpendicular so use m = –3/7

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So, required equation is :

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6 0
3 years ago
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kirill115 [55]
5.5x+180=455
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Answer:

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Step-by-step explanation:

We need to translate each phrase and find the different expression.

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Twice means two times of a number.

Let n be the unknown number.

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From the above expressions it is clear that only 2n is different from other.

Therefore, the correct option is C.

7 0
3 years ago
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