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lawyer [7]
2 years ago
9

HELP!!! 50 Points!!!!!

Mathematics
1 answer:
andreyandreev [35.5K]2 years ago
5 0

Answer:

i think the first and last one.

Step-by-step explanation:

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What is the value of the discriminant for the quadratic equation -3=-x^2+2x? discriminant =b^2-4ac
Elena L [17]

Answer:

<h2>D = 16</h2>

Step-by-step explanation:

-x^2+2x=-3\qquad\text{add 3 to both sides}\\\\-x^2+2x+3=0\\\\a=-1,\ b=2,\ c=3\\\\\text{Substitute to}\ D=b^2-4ac:\\\\D=2^2-4(-1)(3)=4+12=16

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4 years ago
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Solve: 4x + 6 = 8x - 18
sladkih [1.3K]

Answer:

x=-3

Step-by-step explanation:

4x+6=8x+18

We simplify the equation to the form, which is simple to understand  

4x+6=8x+18

We move all terms containing x to the left and all other terms to the right.  

+4x-8x=+18-6

We simplify left and right side of the equation.  

-4x=+12

We divide both sides of the equation by -4 to get x.  

x=-3

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3 years ago
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Please help me if you can thank you. For question A the answer is 5000 brochures. My question is how did they get that answer?
Sophie [7]

Answer:

Step-by-step explanation:

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Company B's equation is 1,500+0.38x5,000

Both equal 3,400 and have to be multiplied by 5,000

8 0
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Simplify this expression: -5(c-3d + 1)
Amanda [17]

Answer:

-5c + 15d - 5

Step-by-step explanation:

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What is the value of x in this equation: 4x + 5 = 3x + 4? Solve the equation using the algebra tiles. x =
Leno4ka [110]

Answer:

Solution of the equation 4x + 5 = 3x + 4 is:

x= -1

Step-by-step explanation:

We are given a equation:

4x + 5 = 3x + 4

We have to solve the equation for x

4x+5=3x+4

subtracting both sides by 4

4x+5-4=3x+4-4

4x+1=3x

subtracting both sides by 4x

4x|+1-4x=3x-4x

1= -x

⇒ x= -1

Hence, solution of the equation 4x + 5 = 3x + 4 is:

x= -1

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4 years ago
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