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diamong [38]
3 years ago
5

Which of the following are quadratic functions?

Mathematics
2 answers:
Tanya [424]3 years ago
5 0
<span>y=2(x-3x^2+1) and if it's a multiple choice I'd also choose </span>y=1/2x^2-13x+4


ANEK [815]3 years ago
3 0
A quadratic function<span> is one of the form f(x) = ax</span>2<span> + bx + c, where a, b, and c are numbers with a not equal to zero. Therefore, options A and C are quadratic equations, </span>y=2(x-3x^2+1) and <span> y=1/2x^2-13x+4. Hope this answers the question. Have a nice day.</span>
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How much cashews at $1.58 per pound must be mixed with walnuts that cost 78 cents per pound to make a mixture of 40 pounds of nu
Likurg_2 [28]

Number of pounds of cashews is 36 pounds and number of pounds of walnuts is 4 pounds.

Step-by-step explanation:

  • Step 1: Given details are cost of cashews = $1.58, cost of walnuts = 78 cents = $0.78, total weight of nuts = 40 pounds, cost of nuts per pound = $1.50
  • Step 2: Let number of pounds of cashews to be mixed be C, then number of pounds of walnuts will 40 - C. Form equation with these variables.

⇒ 1.58 C + (40-C) 0.78 = 40 × 1.50

⇒ 1.58 C + 31.2 - 0.78 C = 60

⇒ 1.58 C - 0.78 C = 60 - 31.2

⇒ 0.8 C = 28.8

⇒ C = 36 pounds

  • Step 3: Calculate number of pounds of walnuts

⇒ Number of pounds of walnuts = 40 - C = 4 pounds

5 0
2 years ago
Read 2 more answers
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Komok [63]

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Selection deals with combination

There are a total of 11 from which 3 are to be selected

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                 = 11!/(3!x8!)

                 =(11x10x9x8!)/(3x2x8!)

                 =11x10x9/6

                 =11x5x3 = 165 ways

                 

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