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svet-max [94.6K]
3 years ago
6

What are the solutions to the equation x2 = 9? Explain why is more than one solution to the equation.

Mathematics
1 answer:
Firdavs [7]3 years ago
6 0

ANSWER

x =  - 3 \:  \: or \:  \: x = 3

The degree is two so it must have more than one solution.

EXPLANATION

The given equation is

{x}^{2}  = 9

Let us use the square root method to solve this equation.

Since the degree of x is two, the <em>fundamental theorem of algebra</em> says it must have 2 roots.

We take square root to obtain,

x =  \pm \sqrt{9}

x =  \pm3

Split the plus or minus sign to obtain,

x =  - 3 \:  \: or \:  \: x = 3

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shusha [124]

Answer:

Dist = 45 m/h * x h

Step-by-step explanation:

We know a speed is a measure of distance over time:  speed = dist / time

In this case, we are looking for a distance expressed in terms of time.

So, we only need to modify the formula a bit: dist = speed * time

We don't know the time (which will be a variable), but we know their speed.  So, the formula becomes:

Dist = 45 m/h * x h

Enter the number of hours in the formula and that will give you an approximation of the distance traveled within that time (approximation since our result will be rely on an average).

6 0
3 years ago
Consider the diagram below. Which of the following represent the values of x,y, and z to the nearest hundredth?
astraxan [27]
See the attached figure to better understand the problem

we know that
in the triangle BCD
y²+5.66²=z²-------> y²=z²-5.66²------> equation 1

in the triangle ABC
y²+5.66²=x²-------> y²=x²-5.66²------> equation 2

equals 1 and 2

z²-5.66²=x²-5.66²--------> z²=x²---------> z=x

if z=x then
angle A=45°
angle D=45°

in the triangle ABD
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z=8
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the answer is
the value of x is 8
the value of z is 8
the value of y=5.65

7 0
3 years ago
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evablogger [386]
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3 years ago
WE GIVE 11 POINTS AND BRAINIEST URGENT HELP
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Answer:

1.  Find < ACB

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Step-by-step explanation:

1.We need to find < ACB

<ACB +<DBC= 180 They make a straight line

Subtract DBC from each side

<ACB = 180 - <DBC  

We know DCB = 113

ACB = 180 -113

ACB = 67

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Subtract 139 from each side

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3 0
3 years ago
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Rudiy27

Answer:

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