Joline is solving the equation 0 = x2 – 5x – 4 using the quadratic formula. Which value is the negative real number solution to her quadratic equation? Round to the nearest tenth if necessary. Quadratic formula: x = StartFraction negative b plus or minus StartRoot b squared minus 4 a c EndRoot Over 2 a EndFraction –5.7 –4 –1 –0.7

- 0.7

Step-by-step explanation:

We are given the general quadratic formula, as " . " This can be represented by two separate formula's, which will come in handy when determining the positive and negative roots of the equation ( and here we need the negative root ):

1 ) ,

2 )

We know that a = 1, b = - 5, and c = - 4 from the equation " " ( which can be rewritten in the form ). Therefore, simply plug in these values into the quadratic formula to receive two solutions:

- This is our positive solution

__________

- And this is our negative solution

You can see that - 0.7 is the negative real number solution to Joline's quadratic equation!

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation:

step-by-step explanation:

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