Twice the difference between x and k

Mathematics

1 answer:

r-ruslan [8.4K]3 years ago

8 0

Twice the difference between x and k is 2(x-k)

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PLS HELP ME WITH 42!! (SHOW WORKKK!!!) + LOTS OF POINTS!!

spayn [35]

We can represent the cost of the notebooks with by saying 0.75n, and the cost of the pens by saying 0.55p.

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Mashcka [7]

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3 years ago

Fifteen times the square of a non-zero number is equal to 20 times number.What is the number? Its not 4/3

e-lub [12.9K]

The number is (2√3) / 3

To find the missing number, convert what it says in words to an equation:
$15 {x}^{2} = 20x$
Divide both sides by 15:
${x}^{2} = \frac{20}{15} \\ \\ {x}^{2} = \frac{4}{3}$
Take the square root:
$x = \sqrt{ \frac{4}{3} } \\ \\ x = \frac{2}{ \sqrt{3} } \\ \\ x = \frac{2 \sqrt{3} }{3}$

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LenKa [72]

5/35
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