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-Dominant- [34]
4 years ago
6

Number 21 and 22 need help

Mathematics
2 answers:
denis-greek [22]4 years ago
7 0
34 * 80 = 2720

2720 words
Snezhnost [94]4 years ago
7 0
34 x 80 = 2720

And 

25 x 24 = 600
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boyakko [2]

<u>Given</u>:

The quadratic equation is x^{2}=-5 x-3

We need to determine the solutions of the quadratic equation.

<u>Solution</u>:

Let us solve the equation to determine the value of x.

Adding both sides of the equation by 5x and 3, we get;

x^{2}+5 x+3=0

The solution of the equation can be determined using quadratic formula.

Thus, we get;

x=\frac{-5 \pm \sqrt{5^{2}-4 \cdot 1 \cdot 3}}{2 \cdot 1}

x=\frac{-5 \pm \sqrt{25-12}}{2 }

x=\frac{-5 \pm \sqrt{13}}{2 }

Thus, the two roots of the equation are x=\frac{-5 + \sqrt{13}}{2 } and x=\frac{-5- \sqrt{13}}{2 }

Hence, the solutions of the equation are x=\frac{-5 + \sqrt{13}}{2 } and x=\frac{-5- \sqrt{13}}{2 }

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Lana71 [14]

Answer:

15

Step-by-step explanation:

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Find the missing length indicated
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Answer:

x = 960

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Answer:

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Step-by-step explanation:

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