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mrs_skeptik [129]
3 years ago
8

Pizza house offers 3 different​ salads, 2 different kinds of​ pizza, and 4 different desserts. how many different​ three-course

meals are​ possible?
Mathematics
1 answer:
Lorico [155]3 years ago
8 0
Assuming you can only pick one type of salad, one type of pizza, and one type of dessert, then the answer is 3*2*4 = 6*4 = 24
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In january of one winter, 3/10 of a wood pile was used in a wood stove. In February, 2/5 of the wood pile was used. What part of
arsen [322]
2/5 is equivalent to 4/10 so at the end of February 4/10 was used up
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Can someone plz help me solved this problem I need help plz help me! Will mark you as brainiest!
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Answer:

13 l of 15%, 13 l of 25%, 26 l of 70%

Step-by-step explanation:

solutions:

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final solution:

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This includes 0.45*52l= 23.4 l acid

Let's assume:

  • amount of 15% solution= x
  • amount of 25% solution= y
  • amount of 70% solution= z
  • and we have z=2y

so there are 2 equation:

  • x+y+z=52
  • 0.15x+0.25y+0.7z=23.4

or

  • x+y+2y= 52 ⇒ x+3y= 52 ⇒ x= 52- 3y
  • 0.15x+0.25y+1.4y=23.4
  • 0.15x+1.65y=23.4
  • 0.15*(52-3y)+1.65y=23.4
  • 7.8-0.45y+1.65y=23.4
  • 1.2y=23.4-7.8
  • 1.2y= 15.6
  • y=15.6/1.2
  • y= 13 l

--------

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