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adoni [48]
3 years ago
10

15.5 rounded to the nearest tenth

Mathematics
1 answer:
Degger [83]3 years ago
3 0
<span>The tenths place is to the right of the decimal point.</span>
In order to round u number to the nearest tenth, you should <span>to the right of the tenths place. Depending on this number you should determine if you will round up or stay the same (if it is bigger than 5 you will round up, if not it will stay the same).
In our case, the number is 15.5 so it is already rounded to the nearest tenth.

</span>
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A 40-meter length of cable is cut into pieces that measure 1.25 meters each. Into how many pieces is the cable cut?
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Answer:

32

Step-by-step explanation:

40 / 1.25=32

3 0
3 years ago
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A stadium has 49000 seats. Seats sell for $25 in section A, $20 in section B, and $15 in section C. The number of seats in secti
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Answer:

A stadium has 49000 seats.  

Seats sell for $25 in Section A, z

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$15 in Section C. ------------------y seats  

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Step-by-step explanation:

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3 years ago
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Murrr4er [49]

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For x and y to be even, x and y have to be a multiple of 2. Let x = 2k and y = 2p where k and p are real numbers. xy = 2k x 2p = 4kp = 2(2kp). The product is a multiple of 2, this means the number is also even. Hence xy is even when x and y are even.

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Given that x and y are odd, we want to prove that xy is odd. For x and y to be odd, they have to be multiples of 2 with 1 added to it. Therefore, suppose x = 2k + 1 and y = 2p + 1 then xy = (2k + 1)(2p + 1) = 4kp + 2k + 2p + 1 = 2(kp + k + p) + 1. Let kp + k + p = q, then we have 2q + 1 which is also odd.

(c) Given that x is odd we want to prove that 3x is also odd. Firstly, we've proven above that xy is odd if x and y are odd. 3 is an odd number and we are told that x is odd. Therefore it follows from the second proof that 3x is also odd.

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