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Fittoniya [83]
2 years ago
14

John has quarters, nickels, and dimes. He has 4 more nickels than quarters and twice as many dimes than nickels. If he had $6.00

, how many quarters does he have?
Show your work in the are below.
Make sure you define the variable. Start with "Let x be..."
Mathematics
2 answers:
mote1985 [20]2 years ago
8 0

Answer:

Let the no of quarters be x

According to given,

x + (x+4) + (x+4)/2 = 6

x + (x+4) + (x + 8)/2 = 6

x + x + 4 + (x + 8)/2 = 6

[2 (2x + 4) + (x + 2)]/2 = 6

4x + 8 + x + 2 = 6 × 2

5x + 10 = 12

5x = 12 - 10

5x = 2

x = 2/5

•°• x = 0.4

1 doller = 4 quarter

0.4 doller = p

p = 0.4 × 4 = 1.6

•°• There are 1.6 quarter.

matrenka [14]2 years ago
3 0
  • Quarters be x
  • Nickels be x+4
  • Dimes be 2(x+4)

ATQ

\\ \sf\longmapsto x+x+4+2(x+4)=6

\\ \sf\longmapsto 2x+4+2x+8=6

\\ \sf\longmapsto 4x+12=6

\\ \sf\longmapsto 4x=-6

\\ \sf\longmapsto x=-3/2

\\ \sf\longmapsto x=|-1.5|

\\ \sf\longmapsto x=1.5

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The wholesale cost of a pair of sandals at a shoe store is $22.60. The markup for the sandals is 45%. What is the selling price
uysha [10]

Answer:

The selling price of sandals is: $32.77

Step-by-step explanation:

Mark up is the price that is added to the cost price of a product for profit.

Given

Price of sandals = $22.60

Mark up = 45%

To find the price with mark up, we will find the amount of mark up and then add it to the cost price of sandals.

Mark\ up = 45\%\ of\ 22.60\\= 0.45*22.60\\=10.17

The mark up is $10.17

Now,

Selling\ price = Cost + mark\ up\\= 22.60+10.17\\=32.77

Hence,

The selling price of sandals is: $32.77

8 0
2 years ago
What is the perimeter of a square with an area of 324 cm2?
andriy [413]

To find the perimeter we must first find the length of the sides. How to do this is shown below:

The formula for the area of a square is:

A = s²

Area = side²

We know that area (A) is 324

324 = s²

Now we must find the length of the side (s). To do this we must get rid of the square. To remove the square from s take the square root of both sides:

√324 = √s²

18 = s

Each side of the square is 18 cm

Now we can find the perimeter of the square using the formula:

P = 4s

P = 4(18)

P = 72

The perimeter of a square with an area of 324 cm² is C. 72 cm

Hope this helped!

~Just a girl in love with Shawn Mendes  

4 0
2 years ago
3/4 (x +21) = 10 1/2<br> What does x equal?
Elena L [17]

Answer:

\huge \boxed{ \boxed{ \red{x  =  - 7}}}

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
  • equation
  • PEMDAS
<h3>let's solve:</h3>
  1. \sf distribute :  \\  \frac{3 x+ 63}{4}  =  10\frac{1}{2}
  2. \sf simplify \: mixed \: fraction :  \\  \frac{3x + 63}{4}  =  \frac{21}{2}
  3. \sf cross \: multipication :  \\ 2(3x + 63) = 84
  4. \sf distribute \: 2 :  \\ 6x + 126 = 84
  5. \sf cancel \: 126 \: from \: both \: sides :  \\ 6x + 126 - 126 = 84 - 126 \\ 6x =  - 42
  6. \sf divide \: both \: sides \: by \: 6 :  \\  \frac{6x}{6}  =  \frac{ - 42}{6}  \\  \bcancel{\frac{6x}{6} } =  \frac{ \cancel{ - 42}  \: ^{ - 7} }{  \cancel{ \: 6}}  \\   \therefore \: x =  - 7
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3 years ago
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Akimi4 [234]
The correct answer is 50
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