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sashaice [31]
3 years ago
13

The price of a DVD player today is $56.60. This is eight dollars less than 2/3 the price of the same DVD player in 2005. What wa

s the cost of the DVD player in 2005?
Is this how I work this problem
2/3+ 56.60-8=C
Mathematics
1 answer:
vladimir2022 [97]3 years ago
8 0
56.60/ 2/3 -8= something thats how you do it if you just wanted to know the formula

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(2x10^3)x(4x10^2) how do you do it help!
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Answer:

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Step-by-step explanation:

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What are the solutions of x^2-2x+5=0
sweet [91]

The solution of x^{2}-2 x+5=0 are 1 + 2i and 1 – 2i

<u>Solution:</u>

Given, equation is x^{2}-2 x+5=0

We have to find the roots of the given quadratic equation

Now, let us use the quadratic formula

x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}  --- (1)

<em><u>Let us determine the nature of roots:</u></em>

Here in x^{2}-2 x+5=0 a = 1 ; b = -2 ; c = 5

b^2 - 4ac = 2^2 - 4(1)(5) = 4 - 20 = -16

Since b^2 - 4ac < 0 , the roots obtained will be complex conjugates.

Now plug in values in eqn 1, we get,

x=\frac{-(-2) \pm \sqrt{(-2)^{2}-4 \times 1 \times 5}}{2 \times 1}

On solving we get,

x=\frac{2 \pm \sqrt{4-20}}{2}

x=\frac{2 \pm \sqrt{-16}}{2}

x=\frac{2 \pm \sqrt{16} \times \sqrt{-1}}{2}

we know that square root of -1 is "i" which is a complex number

\begin{array}{l}{\mathrm{x}=\frac{2 \pm 4 i}{2}} \\\\ {\mathrm{x}=1 \pm 2 i}\end{array}

Hence, the roots of the given quadratic equation are 1 + 2i and 1 – 2i

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1.how many ways can 3 boys and 6 girls sit in a row of 4 chairs?​
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3 years ago
What is 2/5 divide by 3/4
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Step-by-step explanation:

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The system of linear equations 5x+2y = 3 and x+y = -1 is graphed below.What is the solution to the system of equations?
Kazeer [188]

Answer:

<h2>C. (3, -4)</h2>

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If the system of linear equations is graphed, then the solution is the intersection of lines.

Read it from the graph (look at the picture).

7 0
3 years ago
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