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kolbaska11 [484]
3 years ago
5

Kevin said that if the index of a radical is even and the radicand is positive, then

Mathematics
1 answer:
sukhopar [10]3 years ago
5 0

Answer:

Yes Kevin is correct

Step-by-step explanation:

The index, x, of a radical ˣ√ is the numerical value of the root sought of the number located under (within) the radical sign

Therefore, when the index is even, we have, numbers for the radical given by 2x, therefore we have;

⁽²ˣ⁾√(a²ˣ)

Where a = The 2x root of the radicand

Therefore, we can write, a²ˣ = aˣ × aˣ

For which aˣ can be neqative but will still give  a positive value

Therefore, when the index is even, the roots can either be a positive or a negative real number, which are two real numbers, +a or -a

\sqrt[2\cdot x]{a^{2\cdot x}}  = \left | a \right | = \pm a

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A. 42, 120, 162

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Your answer should be 6.4 if you attempt to solve this. I hope this helps your question!
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If you wanted to estimate the mean height of all students at a university, which of the following sampling strategies would be b
xenn [34]

Answer:

c.

Step-by-step explanation:

Hello!

To take a sample to estimate the mean height of all students at a university and that the value you reach is statistically valid you need the sampling method to be random and representative of the whole population, in this example, all university students.

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4 0
3 years ago
A cost of a pair of football boots have been decreased from £70 to £52.50, what was the percentage change?
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3 years ago
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