3 years ago

Which of the following is an element? A. CO2 B. H2O C. Xy D. Na

Chemistry

1 answer:

max2010maxim [7]3 years ago

3 0

I believe the answer is D

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Law Incorporation [45]

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2 years ago

What are the solutions to the quadratic equation 2x2 + 10x - 48 = 0?<br>

Natali [406]

Answer:

Explanation:

$2x^2+10x-48\\=2\left(x^2+5x-24\right)\\x^2+5x-24\\=\left(x^2-3x\right)+\left(8x-24\right)\\=x\left(x-3\right)+8\left(x-3\right)\\=\left(x-3\right)\left(x+8\right)\\=2\left(x-3\right)\left(x+8\right)\\2\left(x-3\right)\left(x+8\right)=0\\x-3=0\\x = 0+3\\x = 3\\x+8=0\\x+8-8=0-8\\x=-8\\x=3,\:x=-8$