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jok3333 [9.3K]
3 years ago
5

Simplify the following polynomial expression.

Mathematics
1 answer:
kakasveta [241]3 years ago
5 0

Answer: 4837.89

Steps:

(534 – 9.13 + 71 – 1) + (-814 + 4.12 – 3.1 + 2) - (-413 + 53 - 1)(21 – 7)

(524.87 + 70) + (-809.88 - 1.1) - (-360-1)(14)

(594.87) + (-810.98) - (-361)(14)

594.87 - 810.98 -(-5054)

-216.11 + 5054

4837.89

Now, i dont know which one matches it with the options since some of them are somehow not staying close to the original number. But I checked that my answer is correct. Brainliest pls if I am correct!

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Answer:

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Step-by-step explanation:

Given:

Sheyna drives to the lake with average speed of 60 mph and

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It took 2 hours less time to get there than it did to get back.

Let t_1 be the time taken to drive to lake.

Let t_2 be the time taken to drive back from lake.

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To find:

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Solution:

Let D be the distance to lake.

Formula for time is given as:

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Putting in equation (1):

\dfrac{D}{36}-\dfrac{D}{60} = 2\\\Rightarrow \dfrac{5D-3D}{180} = 2\\\Rightarrow \dfrac{2D}{180} = 2\\\Rightarrow D = 180\ miles

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t_2 = \dfrac{180}{36}\ hrs = 5\ hrs

So, the answer is:

t_1+t_2 = \bold{8\ hrs}

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