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4 years ago

Evaluate p(-2)=x^3-4x-5

Mathematics

2 answers:

Pani-rosa [81]4 years ago

3 0

Step-by-step explanation:

$p(x) = {x}^{3} - 4x - 5 \\ p( - 2) = {( - 2)}^{3} - 4( - 2) - 5 \\ = - 8 + 8 - 5 \\ = - 5$

Goshia [24]4 years ago

3 0

Answer:

The answer would be -5.

Step-by-step explanation:

First I plugged in negative 2 for every x in the equation, which gives me:

p(-2) = (-2)³ - (4(-2)) - 5.

We solve for the exponents first, which gives us a total of -8 because we are multiplying -2 by itself 3 times. Then we multiply 4 and -2, which gives us negstive 8. However, the first -8 and the second -8 cancel out because the equation has a - sign in between the two, leaving us with only -5. -5 is the answer.

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3 years ago

PLEASE HELP

Rudiy27

Given:

The equation is

$7(x+1)+11x=-2x-5$

To find:

The reason for each statement.

Solution:

We have,

$7(x+1)+11x=-2x-5$

Using distributive property, we get

$7x+7+11x=-2x-5$

On combine like terms, we get

$18x+7=-2x-5$

Using addition property of equality, add 2x on both sides.

$20x+7=-5$

Using subtraction property of equality, subtract 7 from both sides.

$20x=-12$

Using division property of equality, divide both sides by 20.

$x=-\dfrac{12}{20}$

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3 years ago

6.The expressions 5 + 2(x –7) and 5 +2x –14are equivalent by the

satela [25.4K]

Answer:

6) Option B) distributive property is correct

Therefore 5+2(x-7)=5+2x-14 are equivalent by using distributive property

7) Option B) distributive property is correct

Therefore x+3(7-x)=x+21-3x are equivalent by using distributive property

Step-by-step explanation:

6) Given that the expressions 5+2(x-7) and 5+2x-14 are equivalent

To verify that the given expressions are equivalent by which property :

5+2(x-7)

=5+2(x)+2(-7) ( by using the distributive property a(x+y)=ax+ay )

=5+2x-14

Therefore 5+2(x-7)=5+2x-14 are equivalent by using distributive property

Therefore option B) distributive property is correct

7) Given that the expressions x+3(7-x) and x+21-3x are equivalent

To verify that the given expressions are equivalent by which property :

x+3(7-x)

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=x+21-3x

Therefore x+3(7-x)=x+21-3x are equivalent by using distributive property

Therefore option B) distributive property is correct

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