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Oksana_A [137]
3 years ago
7

Which is the solution to the equation -3x-4=5(x+4)

Mathematics
2 answers:
Lorico [155]3 years ago
6 0

Step 1. Expand

-3x - 4 = 5x + 20

Step 2. Add 3x to both sides

-4 = 5x + 20 + 3x

Step 3. Simplify 5x + 20 + 3x to 8x + 20

-4 = 8x + 20

Step 4. Subtract 20 from both sides

-4 - 20 = 8x

Step 5. Simplify -4 - 20 to -24

-24 = 8x

Step 6. Divide both sides by 8

-24/8 = x

Step 7. Simplify 24/8 to 3

-3 = x

Step 8. Switch sides

x = -3

ratelena [41]3 years ago
4 0
X=-3..................
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KonstantinChe [14]
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7 0
2 years ago
What is the domain of the function y=vx<br> 2 0 03X&lt;&lt;<br> 1
Tema [17]

Answer:

<u>Option 3:  0 ≤ x ≤ ∞ </u>

Step-by-step explanation:

The domain of a function is the set of all possible x values for the function.

The given function is y = √x

The domain for the square root function should be : x ≥ 0

So, the domain = [0,∞)

Or, it can be written as inequality

So, 0 ≤ x ≤ ∞

So, the answer is option 3.

6 0
3 years ago
A train travels 25 miles in 20 minutes. What is the train speed in miles per hour?
kenny6666 [7]
60 min = 1 hour

1st we need to know how many times 20 goes in 60 so we will divide.

60 ÷ 20 = 3

Now we will multiply to find the trains speed in miles per hour. 

3 × 25 = 75

SO, the train travels 75 miles per hour. 

Hope I helped ya!! 
4 0
2 years ago
Soooo this is hard... help?
enot [183]
I just did this test the answer is B :-)
5 0
3 years ago
Read 2 more answers
I need help with steps of solving this equation.
saveliy_v [14]

Answer:

x = {-1/5, 1}

Step-by-step explanation:

(5x - 2)² - 1 = 8

Add 1 to both sides

(5x - 2)² = 9

Take the square root of both sides

5x - 2 = ±3

------------------------------

<u>Solution I</u> for 5x - 2 = +3

5x - 2 = 3

add 2 to both sides

5x = 5

Divide both sides by 5

x = 1

------------------------------

<u>Solution II</u> for 5x - 2 = -3

5x - 2 = -3

add 2 to both sides

5x = -1

Divide both sides by 5

x = -1/5

-------------------------------

x = {-1/5, 1}

6 0
2 years ago
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