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3 years ago

PLZZZ HELPPPP!!!!!!!!!!!!!!

Mathematics

1 answer:

ikadub [295]3 years ago

4 0

Answer:

$205.60

160(1.135)+ 160(.15)

Step-by-step explanation:

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Which statement describes if there is an extraneous solution to the equation √x-3 = x-5? A. there are no solutions to the equati

Brrunno [24]

Remember that an extraneous solution of an equation, is the solution that emerges from solving the equation but is not a valid solution.

Lets solve our equation to find out what is the extraneous solution:
 $\sqrt{x-3} =x-5$
$(\sqrt{x-3})^2 =(x-5)^2$
$x-3=x^2-10x+25$
$x^2-11x+28=0$
$(x-4)(x-7)=0$
$x-4=0$ and $x-7=0$
$x=4$ and $x=7$

So, the solutions of our equation are $x=4$ and $x=7$ . Lets replace each solution in our original equation to check if they are valid solutions:
- For $x=7$
$\sqrt{x-3} =x-5$
$\sqrt{7-3} =7-5$
$\sqrt{4} =2$
$2=2$
We can conclude that 7 is a valid solution of the equation.

- For $x=4$
$\sqrt{x-3} =x-5$
$\sqrt{4-3} =4-5$
$\sqrt{1} =1$
$1 \neq 1$
We can conclude that 4 is not a valid solution of the equation; therefore, 4 is a extraneous solution.

We can conclude that the correct answer is: D. the extraneous solution is x = 4

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3 years ago

Help pleaseeeeeeee!!!!

Mars2501 [29]

Answer:

there's an app called mathpapa and if you type in the equation it should answer it for you. or just go to the website. that's how I got passed algebra. GEOMETRY is hard

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3 years ago

alex counted the total number of apples at the dekalb county farmer's market to be 427. if 5/7 of the apples were red, how many

skad [1K]

305 apples would not be red

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3 years ago

What is the corresponding index of the random matrix of 7 criteria for checking consistency of random judgment?

Ymorist [56]

A. 0.58 is the corresponding index of the random matrix of 7 criteria for checking the consistency of random judgment.

In probability theory and mathematical physics, a random matrix is a matrix-valued random variable. H. A matrix whose elements are some or all random variables. Many important properties of physical systems can be represented mathematically as matrix problems.

In probability theory and mathematical physics, a random matrix is a matrix-valued random variable. That is, a matrix whose elements are some or all random variables. Many important properties of physical systems can be represented mathematically as matrix problems.

Learn more about matrix here: brainly.com/question/2456804

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2 years ago

A circle has an area of 36 m2. What is the area of a 40 sector of this circle?

ruslelena [56]

The ratio of the area of the sector (S) to the area of the entire circle (C) is equal to the ratio of the angle subtended to form the sector (As) to the angle for the whole revolution (Ac)
S / C = As / Ac
Substituting the given,
S / 36 m² = 40 degrees / 360 degrees
Solving for S gives, S = 4. Thus, the area of the sector is 4 m².

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3 years ago