3 years ago

I need help asap plz

Mathematics

1 answer:

kogti [31]3 years ago

3 0

Answer:

Thanks for asking!

Step-by-step explanation:

The median is 18.

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Answer:

x= -5

Step-by-step explanation:

just use a calculator

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Bryan is buying notebooks and pens at an office supply store. Notebooks cost $3.59 and pens cost $1.49. He can spend up to $13 o

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Step-by-step explanation:

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Fudgin [204]

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3 years ago

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erik [133]

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lbvjy [14]

Answer:

Step-by-step explanation:

Given the expression

$40=\frac{90^2}{16} sinxcosx\\\\Cross\ multiplying;\\\\16*40 = 90^2 sinxcosx\\\\640 = 90^2 sinxcosx\\\\\frac{640}{8100} = sinxcosx\\ from\ trig\ identity, sin2x = 2sinxcosx\\sinxcosx = sin2x/2\\$

$Hence, \ \frac{640}{8100} = \frac{sin2x}{2} \\\\\frac{2*640}{8100} = sin2x\\ \\\frac{1280}{8100}=sin2x\\ \\0.158 = sin2x\\\\2x = sin^{-1} 0.158\\\\2x = 9.09\\x = 9.09/2\\x =4.545$

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