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slega [8]
3 years ago
8

Please help, thanks a lot

Mathematics
1 answer:
kramer3 years ago
7 0

Answer:

6

Wrong answer my sis messed up my pc

Step-by-step explanation:


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2x2 − 1 = 3x + 4 Which equation correctly applies the quadratic formula?
NNADVOKAT [17]

Standard form: ax^2 + bx + c = y

Steps to simplify:

2x^2 - 1 = 3x + 4

~Subtract (3x + 4) to both sides

2x^2 - 1 - 3x + 4 = 3x + 4 - 3x + 4

~Simplify

2x^2 - 3x - 5 = 0

(a = 2, b = -3, c = -5)

Now that we know what these values are, we can use the quadratic formula to solve.

x=\frac{-b-+\sqrt{b^2-4ac} }{2a} \\x = \frac{-(-3)-+\sqrt{-3^2-4(2)(-5)} }{2(2)}\\x= \frac{-3-+\sqrt{49} }{4} \\x=\frac{3-+7}{4} \\x = \frac{10}{4}~or~\frac{-4}{4}  \\x=\frac{5}{2}~or~-1

Answer: x = 5/2 or x = -1

Best of Luck!

5 0
3 years ago
Greg plowed for 2.5 hours in the morning, 1 hour and 15 minutes in the afternoon, and 1 hour and 30 minutes in the evening. How
HACTEHA [7]

Answer:

Five hours and fifteen minutes.

Step-by-step explanation:

You add all these together and it gets five hours and fifteen minutes.

6 0
3 years ago
Help me please!..
AlexFokin [52]

Answer:

44 times

Step-by-step explanation:

There is a 50% (2/4) chance that this could occur, as given in the question.

88*.5 = 44.

8 0
3 years ago
Please help please and thanks
Bingel [31]
This will help a lot if you go to desmos! Just graph the equation on there! It’s much easier to see on computer

7 0
3 years ago
If f(x) = 2x + 1, find f(1).
____ [38]

Answer:

3

Step-by-step explanation:

5 0
3 years ago
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