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VladimirAG [237]
3 years ago
13

PLEASE HELP ME NOT THAT HARD I THINK

Mathematics
2 answers:
Nookie1986 [14]3 years ago
5 0

Answer: answer is 20 questions total

Step-by-step explanation:

12 Wrong, and 8 right. 60%

Keith_Richards [23]3 years ago
3 0
Set up a proportion
x-12/x = 60/100
100x - 1200 = 60x
40x = 1200
x = 30
30 questions
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T takes 46 minutes for 10 people to paint 3 walls.
Tasya [4]

Answer:

69 mins

Step-by-step explanation:

46/10=4.6 mins per wall

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11.5 x 6=69

6 0
3 years ago
What is -10=k+6 please show work thank you
Tresset [83]

Answer:

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Step-by-step explanation:

-10=k+6

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7 0
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Heron's Formula:
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Answer:

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Step-by-step explanation:

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1 year ago
Convert the complex number z = 4 - 10i from rectangular form to polar form.​
mrs_skeptik [129]

ANSWER

r = 2 \sqrt{29} ( \cos(292 \degree)  + \sin(292 \degree))

EXPLANATION

The polar form of a complex number ,

z = x + yi

is given by:

z = r( \cos( \theta)  + i \sin( \theta) )

where

r =  \sqrt{ {x}^{2} +  {y}^{2}  }

The given complex number is:

z = 4 - 10i

r =  \sqrt{ {4}^{2}  +  {( - 10)}^{2} }

r =  \sqrt{16  + 100}

r =  \sqrt{116}  = 2 \sqrt{29}

And

\theta=  \tan^{ - 1}(\frac{ y}{x} )

\theta=  \tan^{ - 1}(\frac{  - 10}{4} )

\theta=  292 \degree

Hence the polar form is :

r = 2 \sqrt{29} ( \cos(292 \degree)  + \sin(292 \degree))

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3 years ago
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