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zhuklara [117]
3 years ago
10

Elena has 80 trading cards in her collection. If 15%

Mathematics
2 answers:
Reika [66]3 years ago
8 0
The answer is 12


80x0.15=12
therefore 12 of the cards are baseball cards
Helen [10]3 years ago
6 0

Answer:

12

Step-by-step explanation:

the answer is 12

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The sides of a triangle are 1, x, and x2. what are possible values of x?
Whitepunk [10]
The sides of the triangle are given as 1, x, and x².

The principle of triangle inequality requires that the sum of the lengths of any two sides should be equal to, or greater than the third side.

Consider 3 cases
Case (a):  x < 1,
      Then in decreasing size, the lengths are 1, x, and x².
      We require that x² + x ≥ 1
      Solve x² + x - 1 = 
      x = 0.5[-1 +/- √(1+4)] = 0.618 or -1.618.
      Reject the negative length.
     Therefore, the lengths are 0.382, 0.618 and 1.

Case (b): x = 1
   This creates an equilateral triangle with equal sides
    The sides are 1, 1 and 1.

Case (c): x>1
  In increasing order, the lengths are 1, x, and x².
  We require that x + 1 ≥ x²
  Solve x² - x - 1 = 0
  x = 0.5[1 +/- √(1+4)] = 1.6118 or -0.618
  Reject the negative answr.
 The lengths are 1, 1.618 and 2.618.

Answer:
The possible lengths of the sides are
(a) 0.382, 0.618 and 1
(b) 1, 1 and 1.
(c) 2.618, 1.618 and 1.

7 0
3 years ago
No files please........
FinnZ [79.3K]

√7(-8√10+√14)

-8√70+√98

-8√70+√49.2

-8√70+7√2

Just comment if you want to ask

3 0
3 years ago
What is the mean absolute deviation (MAD) of the data set?<br><br> {5, 9, 9, 11, 16}
Lerok [7]
2.8. The mean of the problem was 10. After subtracting each number by 10 I added the absolute value of each difference. I divided that sum by 5 and got 2.8
3 0
3 years ago
Do you have feet or hands
Yanka [14]

Answer:

Feet

Step-by-step explanation:

5 0
3 years ago
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Find the value of x.<br> A) 21 <br> B) 27 <br> C) 31 <br> D) 34
Whitepunk [10]
The answer is a, 21. 21x3 is 63. 63 + 1 = 64.
7 0
3 years ago
Read 2 more answers
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