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Lapatulllka [165]
3 years ago
6

Simplify the surd 3√ 20 +√ 45 ​

Mathematics
2 answers:
vagabundo [1.1K]3 years ago
4 0
9/- 7dndusjjsjddkkdkdksksjdid
melisa1 [442]3 years ago
3 0

Answer:

9\sqrt{5}

Step-by-step explanation:

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab}

Simplify the radicals

\sqrt{20}

= \sqrt{4(5)}

= \sqrt{4} × \sqrt{5}

= 2\sqrt{5}

\sqrt{45}

= \sqrt{9(5)}

= \sqrt{9} × \sqrt{5}

= 3\sqrt{5}

Then

3\sqrt{20} + \sqrt{45}

= 3(2\sqrt{5} ) + 3\sqrt{5}

= 6\sqrt{5} + 3\sqrt{5}

= 9\sqrt{5}

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Charlotte reads 8 1/3 pages of a book in 10 minutes. what is her reading time to the number of pages?
AveGali [126]

Answer:

5/6

Step-by-step explanation:

10minutes = 25/3 pages

Minutes /pages = 25/3 ÷ 10 = 25/3 × 1/10 = 25/30

= 5/6

5 0
3 years ago
Nathan ate 5 over 6 of his sandwich Leroy ate 7 over 8 of his sandwich and Sofia ate 5 over 8 of her sandwich who ate the greate
Oliga [24]
First you have to find a common denominator which would be 24.
5/6 = 20/24
7/8 = 21/24
5/8 = 15/24
So your final answer would be 7 over 8.
5 0
3 years ago
Read 2 more answers
What is 3 + -5= and is it a positive or negative number and how?
Natalka [10]
It is -2.  This is negative.  For instance, if you had 3 candies and your mother took away 5, you would not only have 0 candies, but you would owe your mother 2.  This is expressed as a negative number.  Please mark Brainliest!!!
7 0
3 years ago
Read 2 more answers
Select the correct product.
vfiekz [6]
The correct answer is:  [A]:  " 2x³  +  7x² + 12x − 8 " .
______________________________________________________

Explanation:
__________________________________________
Given:  
__________________________________________
" (x² + 4x + 8) (2x − 1) "  ;  Find the product: 

↔  " (2x − 1) (x² + 4x + 8) "  ; 
__________________________________________

Note:  " (a + b) (c + d + e) = ab + ad + ae + bc + bd + ae " .
__________________________________________

  →  " (2x − 1) (x² + 4x + 8) = 

      (2x * x²) + (2x * 4x) + (2x *8)  + (-1 * x²) + (-1 * 4x) + (-1 * 8) ; 

 =    2x³ + 8x² + 16x + (-1x²) + (-4x) + (-8) ; 

=     2x³ + 8x² + 16x − x² − 4x − 8) ; 

→ Combine the "like terms" :

        + 8x² − x² =  + 7x² ; 

        + 16x − 4x =  + 12x ; 
_______________________________________________________
And rewrite the expression:
_______________________________________________________
   →  " 2x³  +  7x² + 12x − 8 " ;

   → which is:  Answer choice:  [A]:  " 2x³  +  7x² + 12x − 8 " .
_______________________________________________________
7 0
3 years ago
Write 5 consecutive integers of which x is the middle one
stich3 [128]
X-2, x-1, x, x+1, x+2
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3 years ago
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