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raketka [301]
2 years ago
15

N - 4 = 3n + 6 Plz help me if possible no pics

Mathematics
2 answers:
soldi70 [24.7K]2 years ago
8 0

Move all terms containing  n

to the left side of the equation.

Tap for more steps... −

2 n − 4

= 6

Move all terms not containing  n

to the right side of the equation.

Tap for more steps.

− 2 n = 10

Divide each term in

 − 2 n = 10  by  − 2

and simplify.

Tap for more steps.

n = − 5

levacccp [35]2 years ago
4 0

Answer:

n=−5

Step-by-step explanation:

n−4−3n=3n+6−3n

−2n−4=6

Step 2: Add 4 to both sides.

−2n−4+4=6+4

−2n=10

Step 3: Divide both sides by -2.

−2n /−2 =  10 /−2

n=−5

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3 years ago
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3 years ago
The area of a room is 600 square feet. The length is (x + 5) feet and the width is (x + 4) feet. Find the dimensions of the room
tangare [24]
I'm going to assume that the room is a rectangle.

The area of a rectangle is A = lw, where l=length of the rectangle and w=width of the rectangle. 

You're given that the length, l = (x+5)ft and the width, w = (x+4)ft. You're also told that the area, A = 600 sq. ft. Plug these values into the equation for the area of a rectangle and FOIL to multiply the two factors:
A = lw\\
600 = (x+5)(x+4)\\
600 =  x^{2} + 9x + 20


Now subtract 600 from both sides to get a quadratic equation that's equal to zero. That way you can factor the quadratic to find the roots/solutions of your equation. One of the solutions is the value of x that you would use to find the dimensions of the room:
600 = x^{2} + 9x + 20\\
x^{2} + 9x - 580 = 0\\
(x + 29)(x - 20) = 0\\
x + 29 = 0, \:\: x - 20 = 0\\
x = -29, x = 20

Now you know that x could be -29 or 20. For dimensions, the value of x must give you a positive value for length and width. That means x can only be 20. Plugging x=20 into your equations for the length and width, you get:
Length = x + 5 = 20 + 5 = 25 ft.
Width = x + 4 = 20 + 4 = 24 ft.

The dimensions of your room are 25ft (length) by 24ft (width).
8 0
3 years ago
Read 2 more answers
Please help i need to turn it in
larisa [96]

Answer:

978 in

Step-by-step explanation:

(9x6)+(18x18)+(25x24)=978

4 0
2 years ago
Read 2 more answers
8. Solve the following equation. w - 2 = - 3
Alina [70]

Answer:

c. w = -1

Step-by-step explanation:

you have to add 2 with -3 and you get -1.

5 0
2 years ago
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