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attashe74 [19]
4 years ago
14

What is the answer too X2-3X+5=0

Mathematics
1 answer:
ivolga24 [154]4 years ago
8 0
What is the solution (not answer) to (not too) x^2 - 3x + 5 = 0?
This is a quadratic equation.  Two possible approches to solving it are
1) quadratic formula, and
2) completing the square.

Let's use the quadratic formula:

a=1, b= -3, c = 5

Then 
       -(-3) plus or minus sqrt( [-3]^2 - 4(1)(5) )
x = --------------------------------------------------------
                                      2
        3 plus or minus sqrt(9-20)        3 plus or minus i*sqrt(11)
   = ------------------------------------- = ------------------------------------
                              2

Please note:  These are complex roots, due to the " i ".
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Step-by-step explanation:

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Which interval is the solution set to 0.35x - 4.8 < 5.2 -0.9x?
8_murik_8 [283]

Answer:  (-\infty, 8)

Step-by-step explanation:

Given the following inequality:

0.35x - 4.8 < 5.2 -0.9x

You need to solve for "x" in order to find the solution.

The steps are:

1. Add 0.9x to both sides of the inequality:

0.35x - 4.8+0.9x < 5.2 -0.9x+0.9x\\\\1.25x-4.8

2. Add 4.8 to both sides:

1.25x-4.8+4.8

3. Divide both sides by 1.25:

\frac{1.25x}{1.25}

Notice that "x" is  less than 8. This indicates that 8 is not included in the solution and you must use parentheses.

The solution in Interval notation is:

(-\infty, 8)

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3 years ago
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Lera25 [3.4K]

Answer:

Parallel: y = -5x - 34 ; Perpendicular: y = 1/5x - 14/5

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Lines that are parallel have the same slope. Lines that are perpendicular have opposite reciprocal slopes. (Ex. 1/3 ⇒ -3)

We need to substitute the given values into the point-slope form equation.

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y + 4 = -5(x + 6)

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I think the answer is A, 70 square centimeters

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