Determine the sum of x⁴ and x⁴ -3xy + y² and -3x⁴+7xy +10y²
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Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

Steel water aluminum think about the three words listed here. which word could be added as the title of this list of words to tell how these words are related? a) conductors b) heat c) insulators d) metals