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lisov135 [29]
3 years ago
12

What are the roots of x^2 -5x-4=0

Mathematics
1 answer:
allochka39001 [22]3 years ago
3 0

I suggest drawing a graph or simply using a calculator

The answers should be (5 - √ 41) / 2 and (5 + √ 41) / 2

;)

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devlian [24]

Answer:

Children: $13

Adults: $18

Step-by-step explanation:

Well for both sets we can set up the following system of equations,

\left \{ {{3a + 4c = 106} \atop {2a + 3c = 75}} \right.

So first we need to solve for a in the first equation.

3a + 4c = 106

-4c to both sides

3a = -4c + 106

Divide 3 by both sides

<u>a = -4/3c + 35 1/3</u>

Now we plug in that a for a in 2a + 3c = 75.

2(-4/3c + 35 1/3) + 3c = 75

-8/3c + 70 2/3 + 3c = 75

Combine like terms

1/3c + 70 2/3 = 75

-70 2/3 to both sides

1/3c = 4 1/3

Divide 1/3 to both sides

c = 13

Now we can plug in 13 for c in 3a + 4c = 106,

3a + 4(13) = 106

3a + 52 = 106

-52 to both sides

3a = 54

Divide 3 by both sides.

a = 18

<em>Thus,</em>

<em>an adult ticket is $18 and a children's ticket is $13.</em>

<em />

<em>Hope this helps :)</em>

5 0
3 years ago
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A recent trend in advertising is viral marketing. The goal is to convince viewers to share an amusing advertisement by e-mail or
77julia77 [94]
I'm not sure what you are looking for but I'll answer this question based on what I think is needed.

Given:
Day 1: 130 
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The exponential equation of this problem is:
V(n) = 130(4)^n

Where n is the number of days since the video was first shown.

Let us assume that 10 days have past. Total view would be:

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After 10 days, there are more than 136 Million views of the viral video.



5 0
3 years ago
Which is equivalent to sin-1(–0.4)?
Gekata [30.6K]
–2.50 –0.60 –0.41 –0.39
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3 years ago
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Find the leg of each isosceles right triangle when the hypotenuse is 5 square root 6
kozerog [31]
Hypotenuse = 5√6

Let the length of each leg be x, since it is Isosceles .

x² + x² = (5√6)²

2x² = (5 * 5 * √6 * √6)

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x² = 150/2

x² = 75

x = √75

x = √(25 * 3)

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4 years ago
Amy is planning the seating arrangement for her wedding reception. Each round table can sit 12 guests. The head table can sit th
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Answer:

D

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