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3 years ago

I am greater than 4 tens and less than 5 tens I have 9 ones what number am I?

Mathematics

1 answer:

dimaraw [331]3 years ago

5 0

$x\ \in(40;50)\ \ \ and\ \ \ x=10p+9,\ \ \ p\in I+\\\\x=49\\\\Ans.\ The\ number\ is\ 49$

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Rewrite 2 7/9 as a improper fraction

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An airplane mechanic stands on a runway with a horizontal distance of 28 feet from the base of a control tower. The mechanic see

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Step-by-step explanation:

In the above question, we obtain the following information:

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3 years ago

Suppose x is a real number and epsilon > 0. Prove that (x - epsilon, x epsilon) is a neighborhood of each of its members; in

kaheart [24]

Answer:

See proof below

Step-by-step explanation:

We will use properties of inequalities during the proof.

Let $y\in (x-\epsilon,x+\epsilon)$ . then we have that $x-\epsilon$ . Hence, it makes sense to define the positive number delta as $\delta=\min\{x+\epsilon-y,y-(x-\epsilon)\}$ (the inequality guarantees that these numbers are positive).

Intuitively, delta is the shortest distance from y to the endpoints of the interval. Now, we claim that $(y-\delta,y+\delta)\subseteq (x-\epsilon,x+\epsilon)$ , and if we prove this, we are done. To prove it, let $z\in (y-\delta,y+\delta)$ , then $y-\delta$ . First, $\delta \leq y-(x-\epsilon)$ then $-\delta \geq -y+x-\epsilon$ hence $z>y-\delta \geq x-\epsilon$

On the other hand, $\delta \leq x+\epsilon-y$ then $z$ hence $z$ . Combining the inequalities, we have that $x-\epsilon$ , therefore $(y-\delta,y+\delta)\subseteq (x-\epsilon,x+\epsilon)$ as required.

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3 years ago