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Alika [10]
3 years ago
6

Simplify square root of 72 by using imaginary number I

Mathematics
1 answer:
Monica [59]3 years ago
7 0

Answer:

6 \sqrt{2}

Step-by-step explanation:

\sqrt{72 }  =  \sqrt{2 \times 36} \\  = \sqrt{2}  \sqrt{36}  \\  = 6 \sqrt{2}

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1/4-5/8n is equivalent to p(2-5n)​
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Answer:

1/4 - 5/8n = p ( 2- 5n

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2 years ago
What is the value of x, when -25(x - 4) = -55(x - 10)?
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-25(x - 4) = -55(x - 10)\\\\-25x+100=-55x+550\ \ \ |-100\\\\-25x=-55x+450\ \ \ \ |+55x\\\\30x=450\ \ \ |:30\\\\x=15

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The measurement of 2 and justification
Minchanka [31]

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8 0
3 years ago
The prices of two ratios are in the ratio x:y
Archy [21]

Answer:

4:1

Step-by-step explanation:

x+20 : y+20 = 5 : 2

(x+20)/(y+20) = 5/2

2(x+20) = 5(y+20)

2x+40 = 5y+100

2x = 5y+60 (1)

x-5 : y-5 = 5:1

(x-5)/(y-5) = 5/1

x-5 = 5(y-5)

x-5 = 5y-25

x = 5y-20 (2)

Solve (1) & (2) simultaneously,

2(5y-20) = 5y+60

10y-40 = 5y+60

5y = 100

y = 20

x = 5y-20

x = 5(20)-20 = 100-20

x = 80

x:y

80:20

4:1

8 0
3 years ago
Read 2 more answers
Write the product cos(2x)sin(5x) as a sum
ratelena [41]
Come on now, check your book on the "product to sum" identities

\bf cos({{ \alpha}})sin({{ \beta}})=\cfrac{1}{2}[sin({{ \alpha}}+{{ \beta}})\quad -\quad sin({{ \alpha}}-{{ \beta}})]
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