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Nadya [2.5K]
2 years ago
11

What is the number of solutions of 4x^2+12x+9=0?

Mathematics
1 answer:
Gwar [14]2 years ago
7 0

Answer:

One Real number solution

Step-by-step explanation:

check the discriminant

12^2  - 4*4*9

b^2 - 4ac

...

144 - 16*9 =  0

one double root

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stiv31 [10]

Answer:

Step 1: Factor left side of equation.

(5x−1)(3x−5)=0

Step 2: Set factors equal to 0.

5x−1=0 or 3x−5=0

x=

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8 0
3 years ago
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Tell whether the angles are adjacent or vertical. Then find the value of x.
Alexandra [31]

Answer:

Vertical/ x = 25.

Step-by-step explanation:

Vertical angles are self-explanatory; vertical angles are angles that are vertical from each other.

Vertical angles are also congruent (equal), meaning that both angles equal 75°.

4x - 25 = 75.

To solve this expression, we must first add 25 to 75. This is because there is a subtraction sign in front of 25, so we must do the opposite.

25 + 75 = 100

Lastly, divide 100 from 4.

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3 0
2 years ago
Need this one giving lots of points b/c im lazy and i have a headache
charle [14.2K]
B
1/4 = 8/3 * x
X = 8/12
X= 2/3
8 0
3 years ago
If you put a $160 coat on layaway and make a 25% deposit, what is the balance owed?
Anna71 [15]
25% of $160

= (25/100) * 160

= 0.25 * 160

= 40

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Balance owed = $160 - $40 = $120

Balance owed = $120
7 0
2 years ago
The total cost of four pens and seven mechanical pencils is $13.25. The cost of each pencil is .75 cents. Write an equation to f
Dovator [93]
X = pens and y = pencils

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4x + 7(0.75) = 13.25 
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x = 8/4
x = 2 <===so each pen cost 2 bucks
5 0
3 years ago
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