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nikdorinn [45]
4 years ago
7

Write the quadratic equation that has roots (√3+1)/2 and (√3 -1 )/2, if its coefficient with x^2 is equal to:

Mathematics
1 answer:
Bad White [126]4 years ago
3 0

Answer:

Option a

Step-by-step explanation:

Given that ,

the roots are \frac{\sqrt{3}+1 }{2} and \frac{\sqrt{3}-1 }{2}.

We know that quadratic equation with roots a,b is given by

x^{2} -(a+b)x+a.b=0

a=\frac{\sqrt{3}+1 }{2}

b=\frac{\sqrt{3}-1 }{2}

substituting we get,

x^{2}-\sqrt{3}x+1 =0

Hence we see that coefficient of x^{2} is 1.

Option (a)

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mariarad [96]

Answer:

<u>The average speed coming home was 63.27 miles per hour</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Speed from home to Maine = 58 miles per hour

Time of the first leg of the trip = 3 hours or 180 minutes

Time of the second leg of the trip = 15 minutes less = 180 - 15 = 165 minutes or 2 hours 45 minutes

2. What was my average speed coming home?

Let's calculate the distance from home to Maine, this way:

Speed = Distance/Time

Distance = Speed * Time

Distance = 58 * 3 = 174 miles

Now, let's calculate the speed of the second leg, as follows:

Speed = Distance/Time

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Speed = 174/2.75

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8 0
3 years ago
Explain and I’ll mark as brainliest too also worth 20 points
USPshnik [31]

Answer:

x = 3

Step-by-step explanation:

The equation is,

16 = 5x+1

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16-1 = 5x

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7 0
3 years ago
Read 2 more answers
The height of an object off the ground, h (in feet) t seconds after it is launched into the air is given by
creativ13 [48]

The average rate of change of h over the interval is -48 feet per second.

Given,

The height of an object off the ground, h (in feet) t seconds after it is launched into the air is given by

h(t) = −16t2 + 96t, 0 ≤ t ≤ 6.

We need to find the average rate of change of h over the interval [3, 6].

<h3>How do we find the average rate of change of a function over an interval?</h3>

If we have an interval [a, b] and a function f(x).

The rate of change is given by:

= f(b) - f(a) / b - a

We have,

h(t) = −16t² + 96t and [3, 6].

h(6) = -16 x 6² + 96 x 6 = -576 + 576 = 0

h(3) =  -16 x 3² + 96 x 3 = -144 + 288 = 144

The average rate of change of h is:

= h(6) - h(3) / 6 - 3

= 0 - 144 / 3

= -144 / 3

= -48

Thus the average rate of change of h over the interval is -48 feet per second.

Learn more about the average rate of change here:

brainly.com/question/23780823

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1 year ago
Alanina has 28$ in her account. she wants
weeeeeb [17]

Answer: $28...

Step-by-step explanation:

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3 years ago
In the game of​ roulette, a player can place a ​$5 bet on the number 3 and have a startfraction 1 over 38 endfraction probabilit
Misha Larkins [42]
The expected value per game is -0.26.  Over 1000 games, you can expect to lose $263.16.

To find the expected value, we multiply the probability of winning by the amount of winnings, the probability of losing by the amount of loss, and adding those together.

We have a 1/38 chance of winning; 1/38(175) = $4.61.  We also have a 37/38 chance of losing; 37/38(5) = $4.87.

$4.61-$4.87 = -$0.26 (rounded)

To five decimal places, our answer is -0.26136; multiplied by 1000 games, this is $261.36 lost.
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