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VashaNatasha [74]
3 years ago
6

PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP

Mathematics
1 answer:
Alex_Xolod [135]3 years ago
5 0

Answer:

PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP

Step-by-step explanation:

find out what

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Find the number to add to x^2-18x
pentagon [3]

Answer:

A. add 81; (x-9)^2

Step-by-step explanation:

The perfect square formula

(a-b)^2=a^2-2ab+b^2

Rewrite expression x^2-18x as follows:

x^2-2\cdot 9\cdot x

So, to form a perfect square, +9^2 is missed.

When we add 9^2=81, we will get

x^2-2\cdot 9\cdot x+9^2=(x-9)^2

4 0
3 years ago
Solve for x<br> x ^2 +3x−4=0
Alla [95]

Answer:

= 1

= − 4

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
What is the next term of the geometric sequence?<br> 5,20,80
PIT_PIT [208]

Answer:

320

Step-by-step explanation:

5x4=20, 20x4=80, so that means the sequence is just multiplying by 4. 80x4=320, which is your answer.

3 0
3 years ago
Read 2 more answers
Last summers, students who worked earned an average of $80 a week with a standard deviation of $12. What percentage of students
Roman55 [17]

Answer:

  • 2.28%

Step-by-step explanation:

<u>Given:</u>

  • μ = 80
  • σ = 12
  • x = 104

<u>Find z-score:</u>

  • z = (x - μ)/σ
  • z = (104 - 80)/12 = 2

Percent value corresponding to 2 as per z-table is 0.9772. This is corresponding to 97.72%.

<u>Percentage of students earned more than $104:</u>

  • 100 - 97.72 = 2.28
5 0
3 years ago
I need help please?!!!!
klasskru [66]

Answer:

C

Step-by-step explanation:

(3^5)^2 = 3^10

(8^2)^5 = 8^10

therefore

(3/8)^10

7 0
3 years ago
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