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3 years ago

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a jeweler has priced a diamond ring at $850. this price represent $50 less than twice the cost of the ring to the jeweler. find

the cost of the ring to the jeweler

1 answer:

Alla [95]3 years ago

4 0

850$ = X
Cost of ring = Y

X= (Y x 2) + 50

850= (Y x 2)

900=Y x 2

450 = Y

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noname [10]

Answer:

$x=\dfrac{3+ \sqrt{29}}{2}, \quad \dfrac{3- \sqrt{29}}{2}$

Step-by-step explanation:

<u>Quadratic Formula</u>

$x=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\quad\textsf{when }\:ax^2+bx+c=0$

<u>Given quadratic equation</u>:

$x^2-3x-5=0$

<u>Define the variables</u>:

$\implies a=1, \quad b=-3, \quad c=-5$

<u>Substitute</u> the defined variables into the quadratic formula and <u>solve for x</u>:

$\implies x=\dfrac{-(-3) \pm \sqrt{(-3)^2-4(1)(-5)}}{2(1)}$

$\implies x=\dfrac{3 \pm \sqrt{9+20}}{2}$

$\implies x=\dfrac{3 \pm \sqrt{29}}{2}$

Therefore, the exact solutions to the given <u>quadratic equation</u> are:

$x=\dfrac{3+ \sqrt{29}}{2}, \quad \dfrac{3- \sqrt{29}}{2}$

Learn more about the quadratic formula here:

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Read 2 more answers

Each lap around a park is 0.58 miles. Jessica walked 3.25 laps around the park. How many miles did Jessica walk around the park?

xz_007 [3.2K]

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Find the value of x so that the figures have the same area.<br><br> 25ft, x-6 ft<br><br> x ft, 15ft

levacccp [35]

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Pani-rosa [81]

Answer:

B) f(x) ≥ 3x + 4

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Step-by-step explanation:

From the above graph,

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We can see from the graph that

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So we can say,

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Therefore,

The system is

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Vera_Pavlovna [14]

Answer:

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