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3 years ago

HELP ME PLEASE I NEED THIS and tell me how to solve for it

Mathematics

2 answers:

olasank [31]3 years ago

8 0

616.6 cm square is the answer

Vinil7 [7]3 years ago

6 0

Answer:

616.6 square cm

Step-by-step explanation:

Area of a regular octagon

$= 2 {a}^{2} (1 + \sqrt{2} ) \\ = 2 \times {12}^{2} (1 + 1.414) \\ = 2 \times 144 \times 2.141 \\ = 288 \times 2.141 \\ = 616.608 \\ = 616.6 \: {cm}^{2}$

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3 years ago

A man took a trip, traveling by train. He looked out the window during the first 1/3 of the trip. He then slept for 1/5 of the r

kifflom [539]

Answer: 528 km

Step-by-step explanation:

Let x be the total distance traveled by train.

Then, the total time he spent on looking outside the window and in sleeping = $\frac{x}{3}+\frac{x}{5}=\frac{8x}{15}$

Then the remaining distance = $x-\frac{8x}{15}=\frac{7x}{15}$

The time he spent on reading = $\frac{1}{2}\times(\frac{7x}{15})=\frac{7x}{30}$

Since, the train traveled 17.6 km more while he read than while he slept.

Then,

$\frac{7x}{30}-\frac{x}{5}=17.6\\\Rightarrow\ \frac{7x-6x}{30}=17.6\\\Rightarrow\ \frac{x}{30}=17.6\\\Rightarrow\ x=30\times17.6\\\Rightarrow\ x=528$

Hence, the train traveled 528 km.

7 0

3 years ago

HELPPPP!!!!!!!!! ASAP !!

n200080 [17]

Answer:

x > 6

That is one of the answers

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3 years ago

Which is the correct solution to the two step equation below?

Kaylis [27]

Answer: C. x = 50

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3 years ago