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TEA [102]
3 years ago
10

|2n+5|>/9 solve for n?

Mathematics
2 answers:
levacccp [35]3 years ago
5 0
|2n+5|\geq9\iff2n+5\geq9\ or\ 2n+5\leq-9\ \ \ |subtract\ 5\ from\ both\ sides\\\\2n\geq4\ or\ 2n\leq-14\ \ \ \ \ |divide\ both\ sides\ by\ 2\\\\\boxed{n\geq2\ or\ n\leq-7}\\\\Answer:\boxed{\boxed{n\in(-\infty;-7]\ \cup\ [2;\ \infty)}}
borishaifa [10]3 years ago
3 0
|2n+5|\geq9\\
2n+5\geq 9 \vee 2n+5\leq-9\\
2n\geq4 \vee 2n\leq-14\\
n\geq2 \vee n\leq-7\\
n\in(-\infty,-7\rangle\cup\langle2,\infty)
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andrezito [222]

Answer:

\frac{(a+b)}{a^{2} -b^{2}  } + \frac{(a-b)}{a^{2} -b^{2}  } = \frac{2a}{a^{2} -b^{2}  }

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
If a man take one and a half mins to paint a door how much doors can he paint in seven half hour
sashaice [31]

Answer:

300 doors.

Step-by-step explanation:

1.5 minutes for 1 door.

7.5 hours for 300 doors.

7.5 hours = 450 minutes.

\frac{450}{1.5}=300

7 0
3 years ago
Eight times the difference of a number and seventeen is thirty"?
Y_Kistochka [10]
Difference of a number and 17:   x - 17
eight times that = 8(x - 17)
8(x - 17) = 30

divide both sides by 8
x - 17 = 30/8

x = 30/8 + 17 which is 20.75
5 0
3 years ago
Read 2 more answers
In a certain class of​ students, there are 11 boys from​ Wilmette, 7 girls from​ Wilmette, 5 boys from​ Winnetka, 4 girls from​
attashe74 [19]

Answer:

.571

Step-by-step explanation:

We need to find the total number of boys

11+5+4 = 20

And the total number of students

11+7+5+4+4+4 = 35

The Probability that the student is a boy is boy/total

P (boy) = boy/total

           = 20/35

           =4/7

            =.571428571

  to 3 decimal places

           =.571

6 0
3 years ago
- 2x+3 = -X+12<br> Help me please
Harrizon [31]

Answer:

-9

Step-by-step explanation:

-2x + 3 = -x + 12

move -x over by adding

-x + 3 = 12

move the 3 over by subtracting

-x = 9

divide by - to get the x positive

x = -9

7 0
3 years ago
Read 2 more answers
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