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lakkis [162]
3 years ago
15

Please answer asap Please Please

Mathematics
2 answers:
nordsb [41]3 years ago
7 0

Answer:

hmm sorry

Step-by-step explanation:

marusya05 [52]3 years ago
7 0

Step-by-step explanation:

<u>Standard form:</u>

  • y = ax² + bx + c

<u>Vertex form:</u>

  • y = (x - h)² + k

<u>Identity used:</u>

  • (a ± b)² = a² ± 2ab + b²

6 - 7)

<u>Standard to vertex form conversion by completing the square</u>

y = x² - 3x + 16

  = x² - 2*1*3/2 + (3/2)² - (3/2)² + 16

  = (x - 3/2)² - 9/4 + 16 =

  = (x - 1.5)² + 13.75

8 - 9)

<u>Same as above</u>

y = x² - 2x + 3

  = x² - 2*1*x + 1² - 1² + 3

  = (x - 1)² + 2

10 - 12)

<u>Vertex to standard for conversion by opening parenthesis and simplification</u>

y = (x - 11)² + 15

  = x² - 22x + 121 + 15

  = x² - 22x + 136

13-15)

<u>Same as above</u>

y = (x - 4)² + 11

  = x² - 8x + 16 + 11

  = x² = 8x + 27

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Kelly price sells college textbooks on commission. She gets 8 % on the first $7500 of​ sales, 16% on the next $7500 of​ sales, a
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Step-by-step explanation:

Given,

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If x represents the total sales,

Commission for x ≤ 7500 = 8% of x = 0.08x,

Commission for 7500 < x ≤ 15000 = 8% of 7500 + 16% of (x-7500)

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Commission for 7500 < x ≤ 15000 = 8% of 7500 + 16% of 7500 + 20% of (x-15000)

= 600 + 1200 + 0.20(x-15000)

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Thus, the function that shows the given situation,

f(x)=\left\{\begin{matrix}0.08x & x \leq 7500\\ 600+0.16(x-7500) & 7500 < x \leq 15000\\ 1800+0.20(x-15000) & 15000 < x\end{matrix}\right.

Since, 9500 lies between 7500 and 15000,

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