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What is the sum of an unknown number and three times the unknown number?
Four times the unknown number. Let's say the unknown number is x. x + 3x = 4x
5 times an unknown number decreased by the same unknown number is less than the opposite of the sum of the unknown number and 5. What is the number?
The answer is 1. 5 times x - x < 5 + x It has to be 1, anything over 1 could not be less than.
What does infinity times infinity equal?
infinity2 Well, your question does not specify whether the infinities are "countable" infinities (such as the number of integers) or "uncountable" infinities (such as the number of real numbers). If both multiplicands are countable infinities, the product is also countable infinity. If either multiplicand is uncountable, the product is uncountable infinity. Countable infinity is known as "Aleph null", and uncountable infinity as "Aleph one". Infinity times zero may possibly be equivalent to zero though ------------------------------------------------------------------------------------------- ∞ x ∞ = ∞ infinity times infinity equals to infinity Infinity is already the highest number. Technically speaking, there is no highest number. So infinity infinity's is infinity cause infinity is never ending.
Why is zero times infinity undefined?
Because zero multiplied by any number is always zero, but anything multiplied by infinity is infinity. Zero times infinity is being pulled both ways. Also, the definition of infinity is any number x divided by 0. When you multiply zero by infinity, the zeroes "cancel out", leaving absolutely nothing behind.
What is the number when 20 times the square of a non-zero number is equal to 20 times the number?
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