3 years ago

Please help on this one?

Mathematics

1 answer:

miskamm [114]3 years ago

7 0

A, 80% in decimal form is .8 meaning you times the number by .8 and you have 80%

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You talk to a friend who lives in a different state. She tells you that today it is 12° below zero where she lives. You tell her

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Find all real and non-real roots of the function ƒ(x) = x2 + 49. Question 1 options: A) x = –7, 7 B) x = –7i, 7i C) x = –49i, 49

malfutka [58]

Given:

The function is:

$f(x)=x^2+49$

To find:

The all the real and non-real roots of the given function.

Solution:

We have,

$f(x)=x^2+49$

For roots, $f(x)=0$ ,

$x^2+49=0$

$x^2=-49$

Taking square root on both sides, we get

$x=\pm \sqrt{-49}$

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The roots of the given function are -7i and 7i.

Therefore, the correct option is B.

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3 years ago