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Serhud [2]
3 years ago
6

Please I need help! I will give brainliest to whoever answers also. Thank you!

Mathematics
1 answer:
Lostsunrise [7]3 years ago
4 0

Answer:

The set U includes all positive integers from 1 to 20.

a)

<u>x is subset U and 14 < x ≤ 23, then x is:</u>

  • x = {15, 16, 17, 18, 19, 20}

b)

<u>x is subset U and includes multiples of 4, so x is:</u>

  • x = {4, 8, 12, 16, 20}

You might be interested in
How 2 do?<br><br> (n)(n+7)(n+8)
madreJ [45]

Answer:

n^{3} + 15n^{2} + 56n

Step-by-step explanation:

First FOIL  (n + 7)(n + 8) and then distribute n

(n + 7)(n + 8) = n^{2} +15n + 56

 n (n^{2} +15n + 56)

= n^{3} + 15n^{2} + 56n

6 0
3 years ago
Can some one help me with the questions?
Katen [24]
Notice that x+4 is one of the denominators, and that x(x+4) is the LCD.
                      x
Thus, mult. ------- by x(x+4), obtaining  x^2.  
                    x+4
Next, mult. [ 1/x + 1/(x+4) by x(x+4), obtaining   x+4 + x = 2x+4 or 2(x+4)
                                                                x^2
Then the simplified fraction becomes  ----------
                                                              2(x+4)

Generally Brainly allows you to post only 1 or 2 questions at a time.  I will do #15 as a courtesy to you, but want you to try #16 yourself (or to post it separately).

-4, 2, 8, 14, ...  is an arithm. seq.  Every new term is equal to the previous term, plus 6:  -4+6 = 2; 2+6=8, and so on.  Thus:  first term is a = -4; common difference is d = 6

a(50) = a(1) + (50-1)(6), or   a(50) = -4 + (49)(6) = 290 (answer)


6 0
3 years ago
Fatoring Trinomials<br> x^2+2x=-1
Musya8 [376]

Answer:

\Huge \boxed{x=-1}

Step-by-step explanation:

x^2+2x=-1

Adding 1 to both sides of the equation.

x^2+2x+1=-1+1

x^2 +2x+1=0

Factoring the left side of the equation.

x^2 +1x+1x+1=0

x(x+1)+1(x+1)=0

(x+1)(x+1) = 0

(x+1)^2 =0

Taking the square root of both sides of the equation.

\sqrt{(x+1)^2} =\sqrt{0}

x+1=0

Subtracting 1 from both sides of the equation.

x+1-1=0-1

x=-1

8 0
3 years ago
Read 2 more answers
21/√7-5√7/2 solve it
umka21 [38]

Answer:

√72

Decimal Form:

1.32287565…

Step-by-step explanation:

To subtract fractions, find the LCD and then combine.

5 0
2 years ago
Please help solve by using multi step trig
NeTakaya
≈ 30.43 , lmk if u need an explanation
4 0
2 years ago
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