In un quadrato di lato , l'ipotenusa è
. Pertanto, l'area del quadrato è
, mentre il quadrato costruito sull'ipotenusa è
.
Come puoi vedere, una quantità è la metà dell'altra.
A Skier descended down a mountain at a rate of 14 feet per second.what was his total change in elevation after 8 seconds?
1 answer:
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Answer: Choice C (empty set)
The first thing to do is subtract 7 from both sides
|x| + 7 < 4
|x| + 7 - 7 < 4 - 7
|x| < -3
Recall that absolute value represents distance on a number line. Saying |x| is less than -3 means the distance is smaller than -3, which is impossible. Anything smaller than -3 is also negative. Distance can never be negative.
That leads us to the empty set as the solution. There are no values we can plug into any of the inequalities above, to have them lead to true statements.
Writing the special symbol is one way to represent the empty set. Another way is to write curly braces only with nothing inside them like so: { }, so its a set with nothing inside it more or less.