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3 years ago

Which expression shows that x is decreased by 25%

Mathematics

1 answer:

Alenkasestr [34]3 years ago

6 0

Answer:

x - 0.25x OR 0.75x

Step-by-step explanation:

You can calculate 25% of x and subtract it from the initial x value:

x - 0.25x

Or you can subtract 25 from 100 and calculate the remainder percentage:

100-25 = 75

0.75x

Hope this helps!

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3 years ago

If a polynomial function f(x) has roots 6 and square root of 5, what must also be a root of f(x)?

ivolga24 [154]

Answer:

- $\sqrt{5}$

Step-by-step explanation:

A root with square root or under root is only obtained when we take the square root of both sides. Remember that when we take a square root, there are two possible answers:

One answer with positive square root
One answer with negative square root

For example, for the equation:

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If we take the square root of both sides, the answers will be:

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Only getting one solution with square root is not possible. Solutions with square root always occur in pairs.

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It seems you made error while writing option B, it should be - square root of 5.

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