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3 years ago

Which value for x makes the sentence true?

Mathematics

2 answers:

4vir4ik [10]3 years ago

6 0

Answer:

x = 2

Step-by-step explanation:

8x = 4x + 8

Subtract 4x from each side

8x-4x = 4x-4x + 8

4x = 8

Divide each side by 4

4x/4 = 8/4

x = 2

saul85 [17]3 years ago

6 0

Answer:

= 2

Step-by-step explanation:

Subtract 4x4x from both sides.

8x-4x=88x−4x=8

2 Simplify 8x-4x8x−4x to 4x4x.

4x=84x=8

3 Divide both sides by 44.

x=\frac{8}{4}x=

4 Simplify \frac{8}{4}

to 22.

x=2x=2

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9 - x = 6; x = 15 6x = 24; x = 6 35 = 5x; x = 7 x + 10 = 21; x = 31 which one is right

ycow [4]

Answer:

35 = 5x ; x = 7

Step-by-step explanation:

plug 7 in for x

35 = 5(7)

35 = 35

hope this helps!!!

6 0

3 years ago

Read 2 more answers

Simplify completely and find the restrictions on the variable.

MatroZZZ [7]

Answer:

$\displaystyle \frac{x + 2}{x + 9}, \ x \neq -9, \ 12$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Terms/Coefficients
Factoring

Algebra II

Discontinuities
Domain Restrictions

Step-by-step explanation:

Step 1: Define

$\displaystyle \frac{x^2 - 10x - 24}{x^2 - 3x - 108}$

Step 2: Simplify

[Fraction] Factor numerator: $\displaystyle \frac{(x - 12)(x + 2)}{x^2 - 3x - 108}$
[Fraction] Factor denominator: $\displaystyle \frac{(x - 12)(x + 2)}{(x - 12)(x + 9)}$
[Fraction] Divide: $\displaystyle \frac{x + 2}{x + 9}$

We know that x cannot equal -9 because we would get a divide by 0 (undefined) error. We also know that x cannot equal 12 because it was canceled out when simplifying.

7 0

3 years ago

Solve the following quadratic equations using completing the square x2 – 8x – 34 = 0

sveta [45]

Answer:

x=4± 5sqrt(2)

Step-by-step explanation:

x^2 – 8x – 34 = 0

To complete the square Add 34 to each side

x^2 -8x -34+34=0+ 34

Take the coefficient of x, and divide by 2

-8/2 =-4

Then square it and add it to each side

(-4)^2 =16

x^2 – 8x +16 = 34+16

x^2 – 8x +16 = 50

We replace the left side with (x + the coefficient of x/2)^2

(x -4)^2=50

Take the square root of each side

sqrt((x -4)^2)=±sqrt(50)

x-4 = ±sqrt(25*2)

x-4 = ±sqrt(25)*sqrt(2)

x-4 = ±5sqrt(2)

Add 4 to each side

x=4± 5sqrt(2)

6 0

3 years ago

Read 2 more answers

Find the LCM of 2 and 21

Alexus [3.1K]

The answer is 10 because it had

6 0

4 years ago

<img src="https://tex.z-dn.net/?f=3%20%2B%20%28%20-%205%29%20%2B%209%20-%204" id="TexFormula1" title="3 + ( - 5) + 9 - 4" alt="3

mr Goodwill [35]

Answer:

$3$

Step-by-step explanation:

$3+(-5)+9-4=\\3-5+9-4=\\3+9-5-4=\\3$

4 0

3 years ago