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sergij07 [2.7K]
3 years ago
7

Simplify: (x+3)(x-3)-(1-9)

Mathematics
2 answers:
Fiesta28 [93]3 years ago
8 0

Answer:

x^2-1

Step-by-step explanation:

xxMikexx [17]3 years ago
3 0

Answer:

67

Step-by-step explanation:

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Write 10 7 10 as an improper fraction.
blondinia [14]

Answer:

107/10

Step-by-step explanation:

If its set as 10 7/10

10 x 10 = 100 + 7 = 107

107/10

6 0
3 years ago
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What is the value of 2^4+3^2-5
Bogdan [553]

Answer:

20 believe me i got it right if not srry

Step-by-step explanation:

5 0
3 years ago
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Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15. what is her z score?
Andreas93 [3]

Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15 is 3.

According to the given question.

Tobi scored 145 marks on an iq test.

⇒ x = 145

Mean, μ = 100

Standard deviation, σ = 15

As we know that,

A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of values.

And it is calculated by formula

Z = x -μ/σ

Where,

Z is a Z-score

μ is mean

x is the observed value

Therefore,

The Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15

= 145 - 100/15  

= 3

Hence,Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15 is 3.

Find out more information about Z-score here:

brainly.com/question/15016913

#SPJ4

7 0
2 years ago
What does -4(3x-7) =
Sergeu [11.5K]

Answer:

-12x+28

Tell me if u need an explanation!

Hope this Helps!!!

4 0
3 years ago
I need help with this problem please! I'll add a picture of the problem with the answers.
GaryK [48]
Where is th epicture?
7 0
3 years ago
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