3 years ago

Use a half-angle formula to find the exact value of the expression.

Mathematics

1 answer:

NARA [144]3 years ago

5 0

Step-by-step explanation:

The answer is

$\sqrt{2} - 1$

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A boat traveling upstream goes 84 kilometers in 7 hours. If the return trip takes only 3 hours, what is the speed (in kilometers

Hunter-Best [27]

Speed = Distance ÷ time

Speed upstream = 84 ÷ 7 = 12 km/h

Speed downstream = 84 ÷ 3 = 28 km/h

Speed in still water = 1/2(28 + 12) = 20 km/h

Answer: 20 km/h

8 0

3 years ago

Which figure has the largest area?

svetlana [45]

Answer:

The Circle.

Step-by-step explanation:

The Triangle area is 112 ((14*16)/2), the squares area is 100 (10 * 10) and the circles area is 113.1 (6^2 * pi)

Hope this helps!

5 0

3 years ago

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