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alexdok [17]
3 years ago
7

Eight more than twice a number is eight. Find the number.

Mathematics
2 answers:
spin [16.1K]3 years ago
6 0

Answer:

0

Step-by-step explanation:

defon3 years ago
5 0

Answer:

Step-by-step explanation:

2x + 8 = 8

Subtract 8 from both sides.

2x = 0

Divide both sides by 2.

x = 0

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Simplify (9 + 8 – 6)(4 – 5).
Temka [501]

Answer:

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Which set of coordinates satisfies the equations 3x − 2y = 15 and 4x − y = 20?
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Solve the equation 6x^2 + 15x + 3= 2x^2 to the nearest tenth.
Slav-nsk [51]

Answer:

x = -0.2 and x = -3.5

Step-by-step explanation:

Combine like terms in the given equation, by subtracting 2x^2 from both sides:

6x^2 + 15x + 3 = 2x^2

-2x^2                = -2x^2

----------------------------------

4x^2 + 15x + 3 = 0

This is a quadratic equation.  We'll find the two solutions using the quadratic equation

      -b ± √(b^2 - 4ac)

x = ---------------------------

                  2a

Here the coefficients of the quadratic are a = 4, b = 15 and c = 3.

Thus, the discriminant b^2 - 4ac is 15^2 - 4(4)(3), or +177

and from that we know we'll find two real, unequal roots.

                                -15 ± √177

The roots are:  x = ------------------- , or x = -0.2 and x = -3.5

                                         8

5 0
2 years ago
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