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slega [8]
2 years ago
5

Solve the following inequalities and give the solutions in both set and interval notations.

Mathematics
1 answer:
nikdorinn [45]2 years ago
5 0

4y + 3 > 23          subtract 3 from both sides

4y > 20                divide both sides by 4

y > 5

 

-2y > -2                divide both sides by -2 (the order changes)

y < 1

 

(-oo, 1) ∪ (5, oo)

Upvote

SO SORRY IF THESE IS WRONG:(( JUST SAY IT TO ME NOT TO BULLY ME

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In order to conduct an experiment five subjects are randomly selected from a group of 48 subjects how many different groups of f
exis [7]

Answer:

1,712,304 ways

Step-by-step explanation:

This problem bothers on combination

Since we are to select 5 subjects from a pool of 48 subjects, the number of ways this can be done is expressed as;

48C5 = 48!/(48-5)!5!

48C5 = 48!/43!5!

48C5 = 48×47×46×45×44×43!/43!5!

48C5 = 48×47×46×45×44/5!

48C5 = 205,476,480/120

48C5 = 1,712,304

Hence this can be done in 1,712,304ways

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2.Morgan saves $8 each week from babysitting. How many weeks will it take her to save $192?
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Three more than the product of a number 4 is 15
weqwewe [10]
3+4x=15 
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4x=12
x=12/4
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The check is:

<span>If x=3 then, </span>

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<span>3+12=15</span>
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3 years ago
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When two of the three numbers are added at a time, the possible sums are 32, 39, 23. What is the sum of all three numbers?
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Answer:

47

Step-by-step explanation:

Let a, b, and c be those three numbers.

When two of the three numbers are added at a time, the possible sums are 32, 39, 23. Let

a+b=32\\ \\a+c=39\\ \\b+c=23

Add these three equations:

a+b+a+c+b+c=32+39+23\\ \\2a+2b+2c=94

Divide this equation by 2:

a+b+c=47

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