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Genrish500 [490]
3 years ago
13

SOMEONE HELP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Mathematics
2 answers:
n200080 [17]3 years ago
6 0
To find the amount of solutions, you must find the discriminant. The discriminant is b^2 - 4ac. Number 6 has 2 solutions and number 7 has 1 solution.
user100 [1]3 years ago
3 0
Hello there!

The one is asking lot of hard work and I don't know how to write the quadratic formula so I can't show the work for this one.
The answer is : two solutions

#2
Number two is easy to show my work
0 = 3x² + 18x + 27
-3x² - 18x - 27 = 0
Now all we have to do is factorize
-3(x + 3)(x + 3) = 0
Now set each factors equal to 0
x + 3 = 0 or x + 3 = 0
x = - 3
The correct option is A - One solution

A+ Guaranteed! If you have further question or misunderstand the steps please feel free to ask.

Have a nice day!
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Use a transformation to linearize this equation and then employ linear regression to determine parameters a and
uysha [10]
Given the equation

y=\left( \frac{a+\sqrt{x}}{b\sqrt{x}} \right)^2

which models the data tabulated below:

\begin{tabular}
{|c|c|}
x&y\\[1ex]
0.5&10.4\\
1&5.8\\
2&3.3\\
3&2.4\\
4&2
\end{tabular}

The linear regression equation is given by

y=a+bx

where: b= \frac{\Sigma xy-n\bar{x}\bar{y}}{\Sigma x^2-n\bar{x}^2} and a=\bar{y}-b\bar{x}

We extend the given table as follows:

\begin{tabular} {|c|c|c|c|} x&y&x^2&xy\\[1ex] 0.5&10.4&0.25&5.2\\ 1&5.8&1&5.8\\ 2&3.3&4&6.6\\ 3&2.4&9&7.2\\ 4&2&16&8\\[1ex] \Sigma x=10.5&\Sigma y=23.9&\Sigma x^2=30.25&\Sigma xy=32.8 \end{tabular} \\ \\ \\ \bar{x}= \frac{\Sigma x}{n} = \frac{10.5}{5} =2.1 \\ \\ \bar{y}=\frac{\Sigma y}{n} = \frac{23.9}{5} =4.78

Thus,

b= \frac{32.8-5(2.1)(4.78)}{30.25-5(2.1)^2} \\ \\ = \frac{32.8-50.19}{30.25-22.05} = \frac{-17.39}{8.2} \\ \\ =-2.12

and

a=4.78-(-2.12)(2.1)=4.78+4.454=9.234

Therefore, the linearlized form of the equation is y = 9.234 - 2.12x



Part B:

At x = 1.6,

y=9.234-2.12(1.6)=9.234-3.392=5.842
5 0
3 years ago
At a local fruit stand, luisa spends 3.96 for 2 pounds of strawberries. How much can she expect to pay for 4 pounds of strawberr
Oliga [24]
2 pounds = $3.96
4 pounds = $3.96 x 2
4 pounds = $7.92

--------------------------------------------------------------------
Answer: $7.92
--------------------------------------------------------------------
3 0
3 years ago
A surveyor measures the angle of elevation
lisov135 [29]

Check the picture below.

make sure your calculator is in Degree mode.

6 0
4 years ago
A Rectangle is an area of 18 cm² the length of the side are whole numbers .how long could the sides of the rectangle be
alexdok [17]

the sides could be 6 cm and 3 cm

the sides could also be 9 cm and 2 cm

the sides could also be 18 cm and 1 cm

7 0
3 years ago
Workout the median 6266 6626 6622 6226 6662 6222 7466
sasho [114]

Answer:

Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
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