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2 years ago

Karen has 9 feet of lace for her tablecloth. She used 3 feet of lace.

1 answer:

5 0

First calculate th feet of lace she haven't used.
9 - 3 = 6 ft
now we can convert feet into yard. we can divide the amount into 3 because it says 3ft is 1yrd
6 / 3 = 2 yards

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Michelle had a $100. bill she wants to purchase paper pins ($20) and file covers ($20) and paper weights. each paper weight cost

slega [8]

Hi!

100/10 = 10

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3 years ago

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Select the correct answer. Solve the equation for x in terms of c. 2/3(cx + 1/2) - 1/4 = 5/2

Nikolay [14]

Answer:

x = 29/8c

Step-by-step explanation:

2/3(cx+1/2) - 1/4+ 1/4 = 5/2+1/4

2/3(cx+1/2) = 11/4

1/3(cx+1/2) = 11/4 / 2

cx/3 + 1/2/3 = 11/4/2

cx/3 + 1/2*3 = 11/4/2

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cx/3 + 1/6 = 11/8

cx/3 = 11/8 - 1/6

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cx = 29/24 * 3

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3 years ago

You mix 1 3/4 gallons of blue paint with 1 1/2 gallons of yellow paint to make green paint. How much green paint do you have?

irakobra [83]

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3 years ago

Prove that C(50,3) + C(50,4) = C(51,4)

valkas [14]

By definition of the binomial coefficient,

$C(n,k) = \dfrac{n!}{k!(n-k)!}$

so we have

$C(50,3) + C(50,4) = \dfrac{50!}{3!47!} + \dfrac{50!}{4!46!} \\\\ = \dfrac{50!}{3!46!} \left(\dfrac1{47} + \dfrac14\right) \\\\ = \dfrac{50!}{3!46!} \times \dfrac{51}{188} \\\\ = \dfrac{51!}{3!46!} \times \dfrac1{4\times47} \\\\ = \dfrac{51!}{4!47!} \\\\ = \dfrac{51!}{4!(51-4)!} = C(51,4)$

as required.

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1 year ago

Which expression represents "5 less than twice x"?

Strike441 [17]

2x-5 is the expression that represents 5 less than twice x

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3 years ago

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