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zimovet [89]
2 years ago
9

Simplify each expression. (7x+x^4+x^3)-(6x-2x^3+8x^4)

Mathematics
1 answer:
aleksandrvk [35]2 years ago
8 0
the answer is x + 3x^3 - 7x^4
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3 years ago
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sergeinik [125]
\frac{31,50}{x}=\frac{42}{100}

The right fraction represents the percentage; 42 over 100 (100 is the total), or 0.42.
The left fraction is the part number over the whole number. The whole number is unknown, so we use 'x'.


\frac{31.50}{x} = \frac{42}{100}\\\\cross\ multiply\\\\31.50\times100=3150\\42\times x=42x\\\\3150=42x\\x=75
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3 years ago
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1 year ago
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defon

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2 years ago
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