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Orlov [11]
3 years ago
15

Please show work. It’s really urgent too! Thanks :) Sorry if it’s bad quality.

Mathematics
1 answer:
dsp733 years ago
6 0

‎‎‎‎i think that for number one it would be

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Select the correct answer. For which quotient is x=7 an excluded value?
Lisa [10]

Answer:

\frac{7x}{x^2 - 10x + 21} / \frac{x + 7}{7}

Step-by-step explanation:

Given

See attachment

To answer this question, we start by equating the denominators of each option to 0; then, solve for x

(a):

\frac{7x}{x^2 - 10x + 21} / \frac{x + 7}{7}

This gives

\frac{7x}{x^2 - 10x + 21} * \frac{7}{x + 7}

Set the denominator to 0

(x^2 - 10x + 21)(x + 7) = 0

Solve for x

(x^2 - 7x - 3x + 21)(x + 7) = 0

Factorize:

(x(x - 7) - 3(x - 7))(x + 7) = 0

(x - 7)(x - 3)(x + 7) = 0

This implies that:

x = 7\ or\ x = 3\ or\ x = -7

From above, one of the values of x is 7.

This implies that x = 7 is an excluded value for this quotient.

<em>Other options do not need to be checked, since there is only one answer.</em>

6 0
3 years ago
I need help!!!!!!!!!!!!!!
stira [4]
The answer would have to be d
7 0
3 years ago
Read 2 more answers
What is 4:24 in its simplest form?? :-)
Hitman42 [59]
I believe it is 1:6.

I hoped this helped :)
6 0
3 years ago
Read 2 more answers
What are the solutions of 12 - x2 =0?
butalik [34]
I hope that i helped ;D

3 0
2 years ago
Give an answer quick
just olya [345]

Answer:

The price of one DVD is 4 and price of one CD is 5

Step-by-step explanation:

2DVDs and 2CDs = 18

3DVDs and 2CDs = 22

DVDs can be x and CDs can be y:

2x + 2y = 18

3x + 2y = 22

Subtract to get:

-x = -4

x = 4

So the price of one DVD is 4

Plug that into one of the original equations:

2x + 2y = 18

2(4) + 2y = 18

8 + 2y = 18

2y = 10

y = 5

So the price of one CD is 5

5 0
3 years ago
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