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3 years ago

-2(3x-4)=-8x Solve for x

Mathematics

2 answers:

jonny [76]3 years ago

5 0

The answer is -4 because you have to distribute the -2

never [62]3 years ago

3 0

The answer x equals -4

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What is negative twenty-five plus twenty-five

SVEN [57.7K]

Negative and a positive makes a negative.

So, -25 + 25 = 0

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3 years ago

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What is the product? (6r-1)(- Br-3)

Andru [333]

Answer:

$-6Br^2-18r+Br+3$

Step-by-step explanation:

we have the expression:

$(6r-1)(- Br-3)$

We need to multiply the two terms in the first parenthesis by the two terms in the second parenthesis:

$(6r)(-Br)+(6r)(-3)+(-1)(-Br)+(-1)(-3)$

we solve each term taking into account the law of signs

(-)(-)=+

and

(+)(-)=-

also for the first term we use that $r*r=r^2$

thus we have:

$-6Br^2-18r+Br+3$

it can be simplified a little more if we factor an r of the second and third term:

$-6Br^2+r(-18+B)+3$

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3 years ago

Which expression is equivalent to this expression? x(2x+3) Question 1 options: 2x2+3 2x2+3x 2x2−3x 3x + 3

sleet_krkn [62]

Answer:

$2x^2+3x$ is the expression which is equivalent to $x\left(2x+3\right)$ .

In other words:

$x\left(2x+3\right)=2x^2+3x$

Step-by-step explanation:

Given the expression

$x\left(2x+3\right)$

solving

$x\left(2x+3\right)$

$\mathrm{Apply\:the\:distributive\:law}:\quad \:a\left(b+c\right)=ab+ac$

$a=x,\:b=2x,\:c=3$

$=x\cdot \:2x+x\cdot \:3$

$=2xx+3x$

$=2x^2+3x$ ∴ $2xx=2x^2$

Thus,

$x\left(2x+3\right)=2x^2+3x$

Therefore, $2x^2+3x$ is the expression which is equivalent to $x\left(2x+3\right)$ .

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3 years ago

8 - 4y + (-2y) + 5 What is this answer please tell me

Irina-Kira [14]

Answer:

13 - 6y

Step-by-step explanation:

8 - 4y + (-2y) + 5 = 13 - 6y

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3 years ago

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What are prime numbers ? And a list of examples ?

Helga [31]

Answer:

the number which is divisible only by itself and 1 is called prime number. For example; 2,3, 5, 7, 11 and others.

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3 years ago