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Delicious77 [7]
3 years ago
12

What is the correct justification for the first step in solving this equation? 3(x - 4) + 1 = 12x

Mathematics
2 answers:
Y_Kistochka [10]3 years ago
7 0

Answer:

Solve the first part in Parenthese

Step-by-step explanation:

3(X-4)

3x-12+1=12x

         -1   -1

3x-11-12=12x

        -12 -12

3x-11=0x

    -11  -11

3x= -11x

/3      /3

x= -11/9

dybincka [34]3 years ago
5 0

Answer:

x = -11/9

Step-by-step explanation:

3(x-4) + 1 = 12x

Step 1: Use distributive property

3*x - 3*4 + 1 = 12x

3x - 12 + 1 = 12x

Step 2: Combine like terms

3x - 11 = 12x

Step 3: Subtract '3x' from both sides

-11 = 12x - 3x

-11 = 9x

Step 4: Divide both sides by 9

-11/9 = x

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3 years ago
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3 years ago
The base of a triangular sail is 16 m shorter than its height. The area is 96 m squared . Find the base and height of the sail.
HACTEHA [7]

Answer:

Step-by-step explanation:

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Next, we know the area of the triangle is 96, so we should make an equation. The area (96) of a triangle is (b*h)/2. So lets substitute.

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Now, we should simplify the equation. Let us start by moving the /2 to the other side and making it *2.

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5 0
3 years ago
Find (5) for f(x) = (3)<br><br><br> a.9<br> b.3<br> c.27<br> d.81
spin [16.1K]

f(5) is 3.

Step-by-step explanation:

  • Step 1: Given that f(x) = 3. To find f(5), substitute 5 in place of x.

⇒ f(x) = f(5) = 3

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