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Anettt [7]
3 years ago
11

Matilda has 9 books and she wants to give 3 of these books to her sister. How many different gifts are possible?

Mathematics
1 answer:
Alenkinab [10]3 years ago
4 0
This is a tricky question. The way to solve it is C(9,3). To solve it, you do \frac{9*8*7}{3*2*1} so when you solve it, you get 84. Hope it helps!
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The expression that is equal to -10(4x – 5).
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The best answer to your question would have to be -40x - 50
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When finding the length of the hypotenuse of a right triangle why might you approximate the answer
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Read 2 more answers
Use the Side-Splitter Theorem to find x given that NQ is parallel to OP.
In-s [12.5K]

Answer:

x = 7

Step-by-step explanation:

\frac{20}{30} =\frac{14}{14+x}

(20)(14+x)=(30)(14)

280+20x=420

20x=420-280

20x=140

x=140/20=7

Hope this helps

7 0
3 years ago
Can you help me with this? 7
andrezito [222]

Answer:

65º

Step-by-step explanation:

  • The angle of a straight line is 180º, so ∠ABD=180º and ∠ABC=(180-6x)º
  • The sum of the interior angles of a triangle is 180, so (x+40)º+(3x+10)º+(180-6x)º=180
  • We can solve from there, x+40+3x+10+180-6x=180
  • Combine like terms, -2x+230=180
  • Subtract 230, -2x=-50
  • Divide by -2, x=25
  1. m∠CAB=(x+40)º=(25+40)º=65º
  2. m∠ABC=(180-6x)º=(180-150)º=30º
  3. m∠BCA=(3x+10)º=(75+10)º=85º
4 0
3 years ago
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