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Mumz [18]
3 years ago
7

A jar contains n nickels and d dimes. There are 30 coins in the jar, and the total value of the coins is $2.20. How many nickels

and how many dimes are in the jar?
Mathematics
1 answer:
Brums [2.3K]3 years ago
4 0

Answer:

16 Nickles and 14 Dimes

Step-by-step explanation:

What we know

  • n + d = 30
  • .05n + .1d = 2.2  (total change equals $2.20)
  1. (.05n + 0.1d = 2.2) -10
  2. -.5n - d = -22
  3. .5n = 8
  4. n = 16

     

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Step-by-step explanation:

Given

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Answer:

The length of river frontage for each lot are 96.55 ft. 98.85 ft, 101.15 ft and 103.45 ft.

Step-by-step explanation:

See the attached diagram.

The river frontage of 400 ft will be divided into 84 : 86 : 88 : 90 for each lot as AP, BQ, CR, DS and ET all are parallel.

Therefore, PQ : QR : RS : ST = 84 : 86 : 88 : 90 = 42 : 43 : 44 : 45

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What is the relationship between the numerator and the denominator in a fraction?
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<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B%20%7B4%20a%7D%5E%7B2%7D%20%2B%20%20%7B12a%7D%5E%7B2%7D%20%7D%20" id="TexFormula1
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Answer:

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\sqrt{16}  \sqrt{ {a}^{2} }

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4) Simplify.

4a

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