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skelet666 [1.2K]
3 years ago
8

Can someone answer this soon?!?

Mathematics
1 answer:
Sever21 [200]3 years ago
6 0
First get all the terms on the same side:

x^2 + 7x - 4 = 0

Now solve using the quadratic formula which is:

\frac{-b±\sqrt{b^2 - 4ac} }{2a}

Plug in the values:

\frac{-7± \sqrt{49-4(1)(-4)} }{2}

So the answer is:

\frac{-7 ± \sqrt{65} }{2}
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How do cows count<br> [riddle]
crimeas [40]

Answer:

Step-by-step explanation:

I think the answer is utterly perfect

Lol or its a 'cow'nter

8 0
3 years ago
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#1. What term describes a line segment that connects a vertex of a triangle to a point on the line containing the opposite side,
ruslelena [56]
#1
The ALTITUDE is a line segment that connects a vertex of a triangle to a point on the line containing the opposite side, so that the line segment is perpendicular to that line.

#2
The MEDIAN  a line segment that connects a vertex of a triangle to the midpoint of the opposite side
3 0
3 years ago
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The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 year
puteri [66]

Answer:

z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29  

Step-by-step explanation:

information given

\bar X=10.6 represent the sample mean  

\sigma=4.1 represent the population standard deviation

n=45 sample size  

\mu_o =12 represent the value that we want to test  

\alpha=0.05 represent the significance level for the hypothesis test.  

z would represent the statistic

p_v represent the p value for the test

Hypothesis to test

We want to test if the true mean is less than 12, the system of hypothesis would be:  

Null hypothesis:\mu \geq 10  

Alternative hypothesis:\mu < 10  

The statistic is given by:

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

Replacing the info given we got:

We can replace in formula (1) the info given like this:  

z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29  

8 0
3 years ago
I need this answer too please help
VMariaS [17]

Answer:

x = 6

Step-by-step explanation:

When 2 chords of a circle intersect then the product of the parts of one is equal to the product of the parts of the other, that is

2x = 3 × 4, that is

2x = 12 ( divide both sides by 2 )

x = 6

7 0
3 years ago
Write an equation that represents degrees fahrenheit in terms of degrees celsius. let xx represent the temperature in degrees ce
IgorC [24]
As we know Conversion from fahrenheit to celsius is
F - 32 =  \frac{9C}{5}

We can write it also as

F =  \frac{9C}{5}+32

F as y and C as x then we can write it as

y =  \frac{9x}{5} + 32
7 0
3 years ago
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