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3 years ago

Evaluate f(x) = -2x square Root -4 for x=3

Mathematics

1 answer:

lesya [120]3 years ago

8 0

Answer:

Step-by-step explanation:

f(x)=-2x(sqrt(-4))

-2(3)sqrt(-4)

-6(2i)

-12i

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Dmitry_Shevchenko [17]

Answer: Option (D) Add the exponents and keep the same base. Then find the reciprocal and change the sign of the exponent.

Explanation:

Given expression:

$(2^3)(2^{-4})$

<em>Step-1: </em>Add the exponents and keep the same base by using $x^a*x^b = x^{a+b}$ property.

$(2^3)(2^{-4}) = 2^{(3+(-4))} = 2^{-1}$

Step-2: The reciprocal of $2^{-1}$ is $\frac{1}{2^{-1}}$ , which is $2^1$

Step-3: The exponent of $2^1$ is +1; therefore, change the sign of exponent. The end expression will now become:

$2^{-1}$

Hence, the correct option is (D) Add the exponents and keep the same base. Then find the reciprocal and change the sign of the exponent.

3 0

3 years ago

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What Is the solution to the system of equations? Y=-3x-2<br> 5x+2y=15

snow_tiger [21]

Answer:

x,y=-19,55

Step-by-step explanation:

plug in y.

5x+2(-3x-2)=15

5x-6x-4=15

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Plug in.

y=-3(-19)-2

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erik [133]

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