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fgiga [73]
2 years ago
13

29. Martin has some dollar notes. 20% of the notes are $10 notes, 40% of

Mathematics
1 answer:
Katena32 [7]2 years ago
5 0

Answer:

  • 225 notes

Step-by-step explanation:

Let the number of notes is x.

<u>20% of notes is: </u>

  • 0.2x

<u>40% of the remainder is: </u>

  • 40% of 0.8x, so it is
  • 0.8x*0.4 =
  • 0.32x

<u>Remaining notes are:</u>

  • x - 0.2x - 0.32x =
  • 0.48x

<u>Total of the notes:</u>

  • 0.2x*10 + 0.32x*5 + 0.48x*2 = 1026
  • 2x + 1.6x + 0.96x = 1026
  • 4.56x = 1026
  • x = 1026/4.56
  • x = 225
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Step-by-step explanation:

12x + 3(x - 4) + 2x

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8 0
3 years ago
If the same BLANK number is multiplied to each side of a true inequality, the inequality sign is reversed to make the resulting
Maurinko [17]
Answer: Negative
If the same negative number is multiplied to each side of a true inequality, then the inequality sign flips to make the new inequality true as well

Example:
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5 0
3 years ago
A square field has an area of 144 metres squared. If Andrea walked 10 times around this field, what distance did she cover?
Novosadov [1.4K]

Answer:

480m

Step-by-step explanation:

First we have to find the perimeter of the field.

We know that the area is 144m and that the field is a square.

Since a squares sides are all equal, we can do \sqrt{144}, which is 12m.

So, one side of the field is 12m; now we just find the perimeter which is easy since its a square. 12*4=48m

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7 0
2 years ago
Х+ 2y = -1<br> 2x – Зу = 12
yarga [219]
Use substitution method
4 0
3 years ago
A boat cost $11,800 and decreases in value by 10% per year. How much will the boat be worth after 8 years?
Brilliant_brown [7]
10%= .10
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= $2,360

I hope this helped.
5 0
3 years ago
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