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Kazeer [188]
3 years ago
7

Find a. Round to the nearest tenth:

Mathematics
1 answer:
marusya05 [52]3 years ago
5 0

Answer:

14.356

Step-by-step explanation:

that's the answer round up to 14.4

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VikaD [51]

Answer:

Step-by-step explanation:

11 * 1/4

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or 2 3/4

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What is the solution of the equation (x – 5)^2 + 3(x – 5) + 9 = 0? Use u substitution and the quadratic formula to solve.
xz_007 [3.2K]

Answer:

x = \dfrac{7 \pm 3i\sqrt{3}}{2}

Step-by-step explanation:

(x – 5)^2 + 3(x – 5) + 9 = 0

This is a quadratic equation in x - 5.

Let u = x - 5, then the quadratic equation becomes:

u^2 + 3u + 9 = 0

We can use the quadratic formula to solve for u.

u = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}

u = \dfrac{-3 \pm \sqrt{3^2 - 4(1)(9)}}{2(1)}

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x - 5 = \dfrac{-3 \pm 3i\sqrt{3}}{2}

x = \dfrac{-3 \pm 3i\sqrt{3}}{2} + 5

x = \dfrac{-3 \pm 3i\sqrt{3}}{2} + \dfrac{10}{2}

x = \dfrac{7 \pm 3i\sqrt{3}}{2}

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3 years ago
Need answer asap please
liraira [26]

Answer:

option d is correct 3,2

4 0
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Andrew asked every tenth person at the mall how old they are. What type of sample did he form?
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Answer:

it is a convenience sample

Step-by-step explanation:

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