Ask question

Ask question

All categories

2 years ago

15

Solve for x. 2x + 6 – 6x = 30 A. –6 B. –3 C. 3 D. 6

1 answer:

oee [108]2 years ago

7 0

So,

2x + 6 - 6x = 30

Collect Like Terms.
-4x + 6 = 30

Subtract 6 from both sides.
-4x = 24

Divide both sides by -4.
x = -6

Check.
2x + 6 - 6x = 30
2(-6) + 6 - 6(-6) = 30
-12 + 6 + 36 = 30
-6 + 36 = 30
30 = 30 This checks.

S = {-6}

That is option A.

You might be interested in

Write an equation of the cosine function with amplitude pi/2 and period 3

juin [17]

Answer:

$y = \frac{\pi}{2}cos(\frac{2\pi}{3}x)$

Step-by-step explanation:

Given

$Amplitude = \frac{\pi}{2}$

$Period = 3$

Required

Write the equivalent cosine function

The general formula is:

$y = acos(bx)$

Where

$amplitude = |a|$

$period = \frac{2\pi}{b}$

Substitute $\frac{\pi}{2}$ for amplitude in $amplitude = |a|$

$|a| = \frac{\pi}{2}$

$a = \frac{\pi}{2}$

Substitute 3 for period in $period = \frac{2\pi}{b}$

$\frac{2\pi}{b} = 3$

<em>Multiply both sides by b</em>

$2\pi = 3b$

<em>Divide through by 3</em>

$b = \frac{2\pi}{3}$

Hence;

$y = acos(bx)$ becomes

$y = \frac{\pi}{2}cos(\frac{2\pi}{3}x)$

5 0

3 years ago

Evalute 2x^2 – 3x when x = 4.<br> 0 32<br> 0 12<br> O 52<br> O<br> 20

Elis [28]

Answer: 20

Step-by-step explanation: Substitute the value of the variable into the equation and simplify. giving you 20

6 0

3 years ago

Read 2 more answers

Mario has $150 to spend on food for a party. He ordered pizzas that cost $8 each and bottles of soda that cost $2 each which ine

White raven [17]

Answer:

8p + 2s <= 150

Step-by-step explanation:

Let p = number of a pizza.

Let s = price of a bottle of soda.

The inequality is

8p + 2s <= 150

7 0

3 years ago

20 points!! Type the correct answer in the box. Use numerals instead of words. What value of n makes the equation true? -1/5n+7=

vredina [299]

Hey there! :)

Answer:

$\huge\boxed{n = 25}$

-1/5n + 7 = 2

Start by subtracting 7 from both sides:

-1/5n + 7 - (7) = 2 - (7)

-1/5n = -5

Multiply both sides by the reciprocal of -1/5, or -5.

(-5) · (-1/5n) = (-5) · (-5)

n = 25

6 0

3 years ago

What is the least common multiple of 19 and 14?

vodomira [7]

The lest common multiple of 19 and 14 is 266

hope this helped

8 0

3 years ago