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Viefleur [7K]
3 years ago
11

Please help me solve this and show the steps

Mathematics
2 answers:
Artist 52 [7]3 years ago
6 0
9x^3 - 4x = -18x^2 + 8
9x^3  + 18x^2 - 4x- 8 = 0
9x^2(x +2 )- 4(x + 2) = 0
(x+2)(9x^2 - 4) = 0
(x + 2)(3x + 2)(3x - 2) = 0
x + 2 = 0; x = -2
3x + 2 = 0; x = -2/3
3x - 2 = 0; x = 2/3
kozerog [31]3 years ago
5 0
9x^3 + 18x^2 -4x -8
Split the equation into 9x^3 + 18x^2 and -4x -8, then factor
9x^2 (x + 2) -4(x + 2)
So the factors are (9x^2 - 4) and (x + 2)
So X is either equal to -2 or +/- 2/3



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Solve for "W"<br><br> -1 &gt; 2W + 7
jeka57 [31]

-1>2W+7

-8>2w

w = -8/2 = -4

w>-4

8 0
4 years ago
Read 2 more answers
Calculate two iterations of Newton's Method to approximate a zero of the function using the given initial guess. (Round your ans
VikaD [51]

Answer:

The two iterations of f(x) = 1.5598

Step-by-step explanation:

If we apply  Newton's iterations method, we get a new guess of a zero of a function, f(x), xₙ₊₁, using a previous guess of, xₙ.

xₙ₊₁ = xₙ - f(xₙ) / f'(xₙ)

Given;

f(xₙ) = cos x, then  f'(xₙ) = - sin x

cos x / - sin x = -cot x

substitute in "-cot x" into the equation

xₙ₊₁ = xₙ - (- cot x)

xₙ₊₁ = xₙ + cot x

x₁ = 0.7

first iteration

x₂ = 0.7 + cot (0.7)

x₂ =  0.7 + 1.18724

x₂ = 1.88724

 

second iteration

x₃ = 1.88724 + cot (1.88724)

x₃ = 1.88724 - 0.32744

x₃ = 1.5598

To four decimal places = 1.5598

4 0
3 years ago
birute deposite $500 In a savings account with a simple interest rate of 1.3% . how could you use this information to find the i
vladimir2022 [97]

Money Birute deposited in a savings account = $500

Rate of simple interest per annum = 1.3%

▪︎We need to find the interest she will earn in 4 years.

We know that :

\tt \: \color{hotpink}simple \: interest \color{plum}=  \frac{principal \times rate \times time}{100}

In this case :

Principal = $500

Rate = 1.3%

Time = 4 years

Which means :

The simple interest she will earn in 4 years :

= \tt \frac{500 \times 1.3 \times 4}{100}

= \tt \frac{2600}{100}

\color{plum} = \tt\bold{\$26}

Thus, the simple interest she will earn in 4 years = $26

Amount = Principal + Interest

Amount she will gain after 4 years :

=\tt 500 + 26

\color{plum} = \tt\bold{\$526}

Thus, the amount she will gain after 4 years = $526

Amount change in her account = 526 - 500 = 26

We know that :

\tt \: \color{hotpink}percentage \: of \:  change\color{plum} =  \frac{change}{original \: price}  \times 100

Which means :

Percentage of change in her savings account :

=\tt  \frac{26}{500} \times 100

=\tt  \frac{26 \times 100}{500}

=  \tt\frac{2600}{500}

\color{plum} = \bold{\tt\bold{5.2\%}}

<h2>○=> Therefore :</h2>

▪︎Simple interest after 4 years = $26

▪︎Money she will earn after 4 years = $526

▪︎Percentage of change in her savings account = 5.2%

6 0
3 years ago
What do 2psi mean in a math class
Snowcat [4.5K]
Psi stands for pounds per square-inch.
It is a measure of pressure, and is the equivalent pressure of putting one pound on a square-inch of area.
For example, someone weighing 180 pounds standing on his feet, with a footprint area of 72 square-inches would exert a pressure of 180 pounds/72 square inches = 2.5 pounds per square-inch, or 2.5 psi.

5 0
3 years ago
The value of x is:
Alex Ar [27]

Answer:

No solution

Step-by-step explanation:

Kindly include the figure from which to refer angle x

8 0
3 years ago
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