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erma4kov [3.2K]
3 years ago
10

What is a collection of elements

Mathematics
1 answer:
jek_recluse [69]3 years ago
7 0
What kind of elements like on the periodic table? Please be more specific so I could try to help
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What are the roots of the equation? x2−x−42=0 Enter your answers in the boxes.
Levart [38]

Answer:

x = 7  x = -6

Step-by-step explanation:

x^2−x−42=0

Factor

What two numbers multiply to -42 and add to -1

-7*6 = -42

-7+6 = -1

(x-7) (x+6) =0

Using the zero product property

x-7 =0   x+6 =0

x = 7  x = -6

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78362 divided by 509
jok3333 [9.3K]

153.952848723

509 goes into 78362 153.952848723 times.

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Factor 1/6 out of 1/6x+1/6
lesya692 [45]

Answer:

1/6(1x+1)

Step-by-step explanation:

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3 years ago
Use algebraic methods to prove that the given function has an x-intercept that is equal to its y-intercept. In your final answer
Llana [10]

Given the function, y = x/( x^2 – 1)

Add x and subtract x from (x^2 – 1) to make it a complete square

y = x/(x^2 + x – x – 1)

 y = x/[x(x + 1) – 1(x + 1)]

y = x/[(x – 1)(x + 1)]

 

 

In order to find the y -intercept, we set x = 0

When x = 0

y = 0/[(0 – 1)(0 + 1)]

y = 0.

Therefore, the y-intercept is zero.

 

In order to find the x -intercept, we set y = 0

When y = 0

0 = x/[(x – 1)(x + 1)]

The only way the product of a division will be zero is if the numerator is zero

So, if x/[(x – 1)(x + 1)] = 0

x = 0

Therefore, the x-intercept is also zero.

 

Since both x- intercept and y- intercept equal zero,

Then, the given function has an x-intercept that is equal to its y-intercept

5 0
3 years ago
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Express the given percent as a decimal.<br> three-fourths %
dedylja [7]
3/4 as a decimal is 0.75.
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