3 years ago

If a car travels 160 miles in 8 hours, what is the car’s speed?

Mathematics

1 answer:

nexus9112 [7]3 years ago

6 0

Speed = Distance/Time = 160/8 = 20 miles/hour

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Analyze the diagram below and complete the instructions that follow.

Trava [24]

Law of Cosines says

$b^2 = a^2 + c^2 - 2 ac \cos B$

$2 a c \cos B = a^2 + c^2 - b^2$

$\cos B = \dfrac{a^2 + c^2 - b^2}{2 a c}$

$\cos B = \dfrac{16^2 + 16^2 - 11^2}{2(16)(16)} = \dfrac{ 391}{512}$

$B = \arccos \dfrac{ 391}{512} \approx 40.2 ^\circ$

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3 years ago

Solve the system with<br> elimination.<br> x - y = 10<br> 3x - 2y = 25

raketka [301]

Answer:

Step-by-step explanation:

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2 years ago

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bija089 [108]

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Step-by-step explanation:

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3 years ago

The second hand of a clock makes a full revolution once every minute. What is its angle of rotation after 20 seconds? After 45 s

nikklg [1K]

360/60 = 6

6 degrees every second

6*20 = 120 degrees

120 degrees after 20 seconds

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270 degrees after 45 seconds

Hope I helped!

Let me know if you need anything else!

~ Zoe

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3 years ago

7w-180=52w what does w equal

BartSMP [9]

Answer: w= -4

Step-by-step explanation:

7w-180=52w

Subtract 7w on both sides.

-180=45w

Divide both sides by 45.

-4=w

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3 years ago