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2 years ago

–12(x + 3) - 4(5 - 2x) = 20

Mathematics

2 answers:

bekas [8.4K]2 years ago

8 0

-12x -36 -20 +8x = 20
-12x + 8x = 20 + 36 + 20
-4x = 76
x = -19

12345 [234]2 years ago

7 0

Answer:

x = -19

Step-by-step explanation:

1. make parentheses disappeared using distribution law.

$- 12x - 36 - 20 + 8x = 20$

2. sum up b numbers and x

$- 4x - 56 = 20$

3. separate x and number to two sides of the equation

$- 4x = 76$

4. both side divided by -4

$x = - 19$

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2 years ago

Complete the factorization of 3x ^ 2 - 10x + 8 3x^ 2 -10x+8=(x- Box x-4)

aniked [119]

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$3x^2-10x+8=(x-x_1)(x-x_2)=(x-2)(x-\frac{4}{3})$

Step-by-step explanation:

The general form of a quadratic polynomial is given by:

$ax^2+bx+c$ (1)

You have the following polynomial:

$3x^2-10x+8$ (2)

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$x_{1,2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$ (3)

By comparing the equation (1) with the equation (2) you obtain:

a = 3

b = -10

c = 8

Then, you replace these values in the equation (3):

$x_{1,2}=\frac{-(-10)\pm \sqrt{(-10)^2-4(3)(8)}}{2(3)}\\\\x_{1,2}=\frac{10\pm2}{6}\\\\x_1=2\\\\x_2=\frac{4}{3}$

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2 years ago

Which is greater .513 or .5129

Vitek1552 [10]

Answer:

.513 is larger

Step-by-step explanation:

1st method is the thousandths place larger or smaller

.1 tenths

.01 hundredths

.001 thousandths

In this case the thousandths is larger for .513

2nd method

subtract the two number

.513 - .5129 = .0001

Since the number recieved is positive this means .513 is larger

7 0

2 years ago

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