Factor and find all the roots of x^4 +x=0

Mathematics

1 answer:

Furkat [3]3 years ago

7 0

x⁴ + x = 0
x(x³) + x(1) = 0
x(x³ + 1) = 0
x = 0 or x³ + 1 = 0
- 1 - 1
x³ = -1
x = -1

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The time t required to drive certain distance varies inversely with the speed r. It takes 2 hours to drive the distance at 40 mi

Roman55 [17]

Answer:

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Step-by-step explanation:

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Since, here t is INVERSELY PROPORTIONAL to r, we can say:

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Firstly, we have t = 2 hour and r = 40 mph, so we find k:

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Now, secondly, we have r = 45 and k = 80, we need to find t:

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madam [21]

Answer:

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Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

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