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2 years ago

Express -23 in the form bi where b is a real number TIME SENSITIVE

Mathematics

1 answer:

balu736 [363]2 years ago

4 0

Answer:

Step-by-step explanation:

i stands for square root of negative 1. If you multiple i and square root of 23 you will end up with the original

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Use the law of cosines to find the value of cos theta. round your answer to two decimal places

REY [17]

<u>Answer:</u>

The correct answer option is B. 0.21.

<u>Step-by-step explanation:</u>

We are to find the value of $cos \theta$ using the law of cosines.

We know that the formula of the cosine rule is given by:

$c ^ 2 = a ^ 2 + b ^ 2 - 2 a b cos C$

So substituting the given values in the above formula:

$10.9 ^ 2 = 5.8 ^ 2 + 10.5 ^ 2 - 2 (5.8) (10.5) cos C$

$118.81=33.64+110.25-121.8cosC$

$118.81 - (33.64+110.25) = -121.8cosC$

$118.81-143.86=-121.8cosC$

$cosC=\frac{-25.05}{-121.8}$

cos C = 0.21

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3 years ago

Students at Westbrook middle school hold green team meetings

Tems11 [23]

What’s the whole question???!

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3 years ago

what is the sum of an 8th term geometric series if the first term is -11, the last term is 180,224, and the common ratio is -4

Mumz [18]

The sum of n terms is given from the first term and the common ratio by

$S_{n}=a_{1}\dfrac{r^{n}-1}{r-1}$

For your given values of a1=-11, r=-4, n=8, the sum of 8 terms is

$S_{8}=(-11)\dfrac{(-4)^{8}-1}{-4-1}=(-11)\dfrac{65535}{-5}\\\\=144177$

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3 years ago

mark earned $8 per hour plus and additional $50 in tips waiting tables on saturday. He earned $165 in all.

fomenos

Answer:

242+165=$407 because $8 per hour = $192 in 24 hours

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3 years ago

Sara made enough raspberry jam to fill 3

NeTakaya

Answer:

5/8 Jar

Step-by-step explanation:

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2 years ago