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qwelly [4]
3 years ago
14

Does changing the compound inequality x > −3 and x < 3 from “and” to “or” change the solution set? explain.

Mathematics
2 answers:
topjm [15]3 years ago
6 0
Sure yes.

1) x > - 3 or x < 3 means that the solution set is all the numbers greater than - 3 and all the numbers smaller than 3. That is, this union of intervals: (-3,∞) U (-∞,3),  which is all the real numbers.

2) x > -3 and x <3 means that the solution set is the numbers that are at the same time greater than -3 and smaller than 3. That is the intersection of the intervals: (-3,∞) ∩ (-∞,3), which is the interval (-3, 3).
8_murik_8 [283]3 years ago
6 0
Yes. In interval notation: 

<span>x > -3 and x < 3 = (-3, 3) </span>

<span>x > -3 or x < 3 = (-inf, inf) </span>

<span>x > -3 xor x < 3 = (-inf, -3] U [3, inf) where xor is the "exclusive or", either-or but not both.</span>
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erik [133]

Answer:

25 girls

Step-by-step explanation:

Let

x denote number of boys

and

y denote number of girls

According to the statement that total 45 people came,

x+y = 45      => Eqn 1

And total paid amount was 175

So,

5x + 3y = 175    => Eqn 2

For solving, We will use the substitution method

So, from eqn 1

x = 45-y

Putting value of x in eqn 2

5(45-y) +3y = 175

225 - 5y + 3y = 175

-2y+225 = 175

-2y = 175-225

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y = 25

Putting y =25 in eqn 1

x+25 = 45

x = 45 - 25

x = 20

As y= 25

So, 25 girls came to the dance ..

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2 years ago
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2 years ago
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evablogger [386]

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5 0
3 years ago
Lines and triangles practices
Marianna [84]
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4 0
3 years ago
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