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zubka84 [21]
2 years ago
15

Can you help me please ​

Mathematics
1 answer:
Advocard [28]2 years ago
6 0
Honestly, I don’t really know but I believe it’s 3
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Which pair of statements about the lengths of two sides of the triangle is true?
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B

Step-by-step explanation:

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Tony and Cleo are donating some of their books to a hospital. If Tony contributes half of his books and Cleo gives one third of
liraira [26]
Short Answer: Tony 40 Cleo 30
Givens

T = Tony
C = Cleo

Equations
1/2 T + 1/3 C = 30      (1)
2/5 T + 1/2 C = 31       (2)

Adjustments
Multiply  (1) by 3
Multiply (2) by 2

New Equations
3/2 T + C = 90      (1a)
<u>4/5 T + C = 62</u>      (2a) Subtract (2a) from (1a)
(3/2 - 4/5)T = 28                      the common multiple of 2 and 5 = 10. 
(15/10 - 8/10)T = 28
7/10 T = 28                              Multiply by 10
7T = 28*10
7T = 280  Divide by 7
T = 280/7 = 40

Put T = 40 into (1)
1/2 T + 1/3 C = 30
1/2 (40) + 1/3 C = 30
20 + 1/3 C = 30                      Subtract 20 from both sides.
1/3 C = 30 - 20
1/3 C = 10                              Multiply through by 3
C = 10 * 3
C = 30

Answer:
Cleo has 30 books.
Tony has 40 books.

Check
<em>Use Equation 2</em>
2/5 T + 1/2 C = 31
2/5*40 + 1/2 * 30 = ? 31
16 + 15 =?3`
31 = 31 They are equal.

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Step-by-step explanation:

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A/b=c for b<br> Wht is b
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The answer would be b=a/c
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