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viva [34]
4 years ago
6

There are 2 questions i am confused about on the asignment can anyone assist me on these?

Mathematics
1 answer:
HACTEHA [7]4 years ago
4 0
the second one is B
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Answer: 37.5^{\circ}  or  37\dfrac{1}{2}^{\circ}

Step-by-step explanation:

Given : The temperature of the liquid changed by -82\dfrac{1}{2}^{\circ}C over 2\dfrac{1}{5} minutes.

We can write [tex]82\dfrac{1}{2}=\dfrac{82\times2+1}{2}=\dfrac{165}{2}

2\dfrac{1}{5}=\dfrac{11}{5}

Now, the statement becomes ,

The temperature of the liquid changed by -\dfrac{165}{2}^{\circ}C over \dfrac{11}{5} minutes.

i.e. temperature changed in \dfrac{11}{5} minutes =  -\dfrac{165}{2}^{\circ}C

Now, by Unitary method,

The temperature changed in 1 minute =   \dfrac{165}{2}\times\dfrac{5}{11}^{\circ}C

⇒ The temperature changed in 1 minute = 37.5^{\circ} or  37\dfrac{1}{2}^{\circ}

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The point (3,-7) lies on a circle and the center of the circle is at (-2,-7). What is the equation of this circle
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the answer is in the above image

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Please help me find the perimeter and the base **use 3.14 instead of π** marking brainliest
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You’re headed to the bank with two friends to exchange your American dollars for the South African currency rand, for an upcomin
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Yes, the relationship between the money exchanged and the local currency represent a function. That function is given as follows: $1 = Rx * 100 where x is the current exchange rate of of the Rand.

<h3>What is a function?</h3>

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The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined. The range is the set of all valid y values.

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