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2 years ago

What are the roots of the equation 16x2 – 64x + 65 = 0 in simplest a + bi form?

Mathematics

1 answer:

Semenov [28]2 years ago

8 0

Step-by-step explanation:

$16 \times 2 - 64x + 65 = 0 \\ 97 - 64x = 0 \\ - 64x = - 97 \\ divide \: both \: side \: by \: - 64 \\ x = \frac{97}{64}$

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Step-by-step explanation:

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2 years ago

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2 years ago

Lucy spends 4 hours a week babysitting. Her sister Lily spends seven eighths as much time babysitting. Does Lily babysit for mor

olganol [36]

Answer:

Lily babysit for less than 4 hours.

Step-by-step explanation:

Given:

Lucy spends in a week babysitting for 4 hours.

Lily spends seven-eighths of 4 hours.

Now, to find whether Lily babysit for more than 4 hours or less than that.

Number of hours Lucy babysit = 4 hours.

So, to get the hours Lily babysit:

$\frac{7}{8}\ of\ 4\ hours.$

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On simplifying we get:

$=\frac{7}{2} \\\\=3\frac{1}{2}\ hours.$

Thus, Lily spends $3\frac{1}{2}\ hours$ for babysitting which is less than 4 hours.

Therefore, Lily babysit for less than 4 hours.

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3 years ago

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