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topjm [15]
3 years ago
15

Do any of you guys no this If 18 is 45% of a value, what is that value?

Mathematics
2 answers:
iragen [17]3 years ago
8 0

Answer:C.40

Step-by-step explanation:

Fynjy0 [20]3 years ago
8 0

Answer:

C. 40

Step-by-step explanation:

18/x = 45/100, x is the value we are looking for

18/x = 45/100

1800/x = 45                   multiply both sides by 100

1800 = 45x                    multiply both sides by x

40 = x                             divide both sides by 45

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(199-55)/9= t
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How can you determine the difference between an arithmetic and geometric sequence if you are given the first 4 terms of the sequ
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Compute successive differences of the terms.

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Example of arithmetic sequence:
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Successive differences are 3-1 = 2, 5-3 = 2, 7-5 = 2. All the differences are 2, which is the common difference of the sequence.

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3 years ago
The coffee Lily likes is composed of 97.3% water and 2.7% cocoa. The coffee John likes is composed of 96% water and 4% cocoa. Ho
mestny [16]

30 ounces of the coffee John likes consists of

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  • 0.04\cdot30=1.2 ounces of cocoa

To this mixture we're adding x ounces of water, so that the new mix has a total volume of 30+x ounces and matches the composition of the coffee Lily likes. This means it would consist of

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  • 0.027\cdot(30+x)=1.2 ounces of cocoa (same amount of cocoa as before because pure water is being added)

Solve for x:

0.973(30+x)=28.8+x\implies29.12+0.973x=28.8+x

\implies0.39=0.027x

\implies x\approx14.4

###

Just to confirm: the new mixture consists of

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  • 1.2+0=1.2 ounces of cocoa

giving a total volume of 43.2+1.2=44.4 ounces of coffee, and \dfrac{43.2}{44.4}\approx0.973, as required.

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