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vodomira [7]
3 years ago
9

HI HELP ME W MATH PLSS!!

Mathematics
1 answer:
4vir4ik [10]3 years ago
6 0

Answer:

a) 79.6

b) 437.8

Step-by-step explanation:

First, you have to do 318.4/4 to find the rate she goes in the duration of an hour. The rate is 79.6, which means she travels at a rate of 79.6 kilometers per hour.

Then, you have to find the distance she takes to travel in 5.5 hours, so you have to do 5.5*79.6 which is 437.8.

So, Hannah travels 437.8 kilometers in 5.5 hours.

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Read 2 more answers
If cosθ = x, then ± √(1+x)/2 = _____.<br><br>cosθ/2<br>sinθ/2<br>cos2θ<br>sin2θ
Lyrx [107]

Answer:

cos(theta/2) = sqrt((1+x)/2)

Step-by-step explanation:

From the double angle formula

cos^2(t)-sin^2(t) = cos(2t)  ...................(1)

cos^2(x)+sin^2(x) = cos(t-t) =1...............(2)

Add (1) and (2)

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cos^2(t) = (1+cos(2t))/2

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substitute t = theta/2

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substitute cos(theta) = x

cos(theta/2) = sqrt((1+x)/2)

6 0
4 years ago
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