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Sveta_85 [38]
3 years ago
5

HELP ASAP!! 7. Solve

Mathematics
1 answer:
natita [175]3 years ago
7 0

Answer:

x = 0°

Step-by-step explanation:

Given

- 2 + 6cosx = 8 - 4cosx ( add 4cosx to both sides )

- 2 + 10cosx = 8 ( add 2 to both sides )

10cosx = 10 ( divide both sides by 10 )

cosx = 1 , thus

x = cos^{-1} (1) = 0° for 0° ≤ x ≤ 180°

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An aeroplane covers a certain distance at a speed of 240km/h in 5 hours. To cover the same distance in 1 2/3 hours, it must trav
shtirl [24]

Answer:

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Step-by-step explanation:

The ratio of times is ...

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  s = 240(3) = 720 . . . . km/h

The aeroplane must travel at a speed of 720 km/h.

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2 years ago
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ruslelena [56]

Answer:

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Step-by-step explanation:

Multiply these binomials in the usual way:

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3 years ago
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marusya05 [52]

Answer:

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Step-by-step explanation:

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