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3 years ago

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Which of the following are quadratic functions?

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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Tema [17]

Answer:

Small box weighs 13.75 kg & large box weighs 15.75 kg

Step-by-step explanation:

We can write 2 simultaneous equation and solve for weight of each box.

<em>Let weight of large box be l and small box be s.</em>

<em />

"<u>3 large boxes and 5 small boxes has a total weight of 116 kilograms</u>":

$3l+5s=116$

and

"<u>9 large boxes and 7 small boxes has a total weight of 238 kilograms</u>":

$9l+7s=238$

<em>Now we can solve for l in the 1st equation and put it into 2nd equation and get s:</em>

<em> $3l+5s=116\\3l=116-5s\\l=\frac{116-5s}{3}$ </em>

<em>now,</em>

<em> $9l+7s=238\\9(\frac{116-5s}{3})+7s=238\\3(116-5s)+7s=238\\348-15s+7s=238\\348-238=15s-7s\\110=8s\\s=\frac{110}{8}=13.75$ </em>

<em />

<em>now we plug in 13.75 into s into equation of l to find s:</em>

<em> $l=\frac{116-5s}{3}\\l=\frac{116-5(13.75)}{3}\\l=15.75$ </em>

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Answer:

36

Step-by-step explanation:

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Step-by-step explanation:

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