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Leona [35]
3 years ago
7

Rewrite the following expression with rational exponents. 3 sq root -27x^2 y^7 Show your work

Mathematics
1 answer:
andrew-mc [135]3 years ago
7 0

Answer:

Step-by-step explanation:

The square root is possible only if y≤0

if y>0 the expression lose meaning, in fact (-)(+)(+) = (-) and a square root of a negative number doesn’t exist. x^2 is a square so it is ever positive if x is not 0

if y≤0 can be rewritten as:

3(-27x^2y^7)^1/2

or if we want simplify the expression:

3 \sqrt{3^2 * (-3) * x^2 * y^6 * y} = 3^2|x||y|^3 (-3y) ^1/2

we have to put the symbol of absolute value between x and y because a x^2 and y^6 are numbers that are ever positive, while x and y^3 can be also negative. Thanks to the simbol of absolute value we can “force” them to be positive

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Step-by-step explanation:

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3 years ago
Two inches is approximately
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Answer:

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5 0
3 years ago
Which phrase best describes the translation from the graph y = (x – 5)2 + 7 to the graph of y = (x + 1)2 – 2?
Andreas93 [3]

The parent. function shifted up by 6 units to produce x + 1 and to the left by 9 units

<h3>What is translation?</h3>

This is a way of changing the position of an object on an xy-plane.

Given the parent function expressed as  y = (x – 5)^2 + 7

From the resulting image after translation, we can see that the parent. function shifted up by 6 units to produce x + 1 and to the left by 9 units

Learn more on translation here; brainly.com/question/12861087

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8 0
2 years ago
A line passes through the points (5, –7.5) and has a y-intercept of 10.
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Step-by-step explanation:

need help with explanation?

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