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goblinko [34]
3 years ago
8

Which statement is true about the difference 2 square root of 7 − square root of 28 ?

Mathematics
1 answer:
boyakko [2]3 years ago
5 0

I'll go slow:

2\sqrt 7 - \sqrt{28}

=2 \sqrt 7 - \sqrt{4 \cdot 7}

=2 \sqrt 7 - \sqrt{4} \cdot \sqrt{7}

=2 \sqrt7 - 2 \sqrt 7

=0

Answer: B  rational and equal to 0.

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Which expression is equivalent to x³ - x² - 14x + 24?
serg [7]

Answer:

<h3>A. ( x - 2 )( x - 3 )(x + 4 )</h3>

<h3>Step-by-step explanation:</h3>

<h3>x³ - x² - 14x + 24</h3>

<h3>1. Use the rational root theorem</h3>

= (x  - 2) \frac{x ^{3}  -x^{2}  - 14x + 24}{x - 2}

<h3>2. \frac{  {x}^{3} - {x}^{2}  - 14x + 24 }{x - 2}  =  {x}^{2}  + x - 12</h3><h3 />

= ( x - 2 )( x² + x - 12 )

<h3>3. Factor x² + x - 12 : ( x -3 )( x + 4)</h3>

= ( x - 2 )( x - 3 )(x + 4 )

<h3>Solution : </h3>

<h3>= ( x - 2 )( x - 3 )(x + 4 )</h3>
3 0
2 years ago
A shipping box in the shape of a rectangular prism has the dimension shown.
pogonyaev

Answer:

18 feet³

Step-by-step explanation:

3 · 3 · 2 =

9 · 2 =

18 feet³

8 0
2 years ago
I'm stuck idkdmsjshhdhd
Klio2033 [76]
I hope this helps you



1)


a) 18/50


b) 6.1/3=2


c) 9/2.8/3=3.4=12


2)


1 1/2=1.2+1/2=3/2


3 3/4=3.4+3/4=15/4



if we can 12 muffins with 3/2 cups


how many muffins with 15/4


?.3/2=12.15/4


?=30 muffins


3 0
3 years ago
I don't understand what the question is asking?
lana66690 [7]
OK for this question you need to find out how many more post are needed. If you look at the diagram it shows that one side is 50 feet.  Now there are two sides that will need post, because the barn side need no more.  Now if there are two side both 50 feet, and you need a post every ten feet. How many posts are needed? 

5 0
4 years ago
Read 2 more answers
What is the explicit rule for the sequence? −3, 0,3,6,9,... Enter your answer in the box.
PtichkaEL [24]

Answer:

  • aₙ = 3n - 6

Step-by-step explanation:

<u>Given sequence:</u>

  • −3, 0,3,6,9,...

<u>This is AP with:</u>

  • The first tern a₁ = - 3
  • Common difference d = 3

<u>The rule for the nth term of the sequence is:</u>

  • aₙ = a₁ + (n - 1)d

<u>Substitute values:</u>

  • aₙ = -3 + (n - 1)(3) =
  •       -3 + 3n - 3 =
  •        3n - 6

3 0
3 years ago
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