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erma4kov [3.2K]

3 years ago

10

Which angle is an acute angle?

2 answers:

larisa [96]3 years ago

4 0

there is no acute angle.......

kirill [66]3 years ago

3 0

Answer:

angle CPB is an acute angle cause it's measure is less than 90°

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Yul has lunch at a restaurant. The bill is $14.50 and the sales tax amount is 5%. If he wants to leave a 20% tip after the sales

jek_recluse [69]

Answer:

The tip will be $3.05.

The bill will cost $18.28 with the tip and tax.

Step-by-step explanation:

14.50 + 5% (or 0.73) = 15.23

15.23 + 20% (or 3.05) = 18.28

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3 years ago

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rodikova [14]

Answer:

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Step-by-step explanation:

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Maria determined that the length of her driveway from the main road is 35.25 meters.

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3 years ago

How to find the square root of complex numbers?? Find the square root of (6+8i) ??

ivann1987 [24]

Answer:

$2 \sqrt{2} + i \sqrt{2}$

Step-by-step explanation:

The square of a complex number is a complex number. Here, we have:

${(a + bi)}^{2} = 6 + 8i$

${a}^{2} + 2abi - {b}^{2} = 6 + 8i$

We then have this system of equations:

${a}^{2} - {b}^{2} = 6$

$2ab = 8$

Solving this system:

$ab = 4$

$b = \frac{4}{a}$

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${a}^{2} - \frac{16}{ {a}^{2} } = 6$

${a}^{4} - 16 = 6{a}^{2}$

${a}^{4} - 6 {a}^{2} - 16 = 0$

$( {a}^{2} - 8)( {a}^{2} + 2) = 0$

${a}^{2} = 8$

$a = 2 \sqrt{2}$

$b = \frac{4}{2 \sqrt{2} } = \sqrt{2}$

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2 years ago

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Which point is the vertex?<br> C<br> B<br> A<br> None of the above

Karo-lina-s [1.5K]

Answer:

B

Step-by-step explanation:

Hope this helps you out! :)

3 0

3 years ago