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8_murik_8 [283]
3 years ago
11

Which statement is true about the expression 12-7+3

Mathematics
2 answers:
Amiraneli [1.4K]3 years ago
6 0
The answer to the question is 8
disa [49]3 years ago
6 0

Answer:

The expression is equivalent to 12 - (7 + 3) because of the associative property

Step-by-step explanation:

The associative property states that you can add or multiply regardless of how the numbers are grouped. By 'grouped' we mean 'how you use parenthesis'. In other words, if you are adding or multiplying it does not matter where you put the parenthesis. Add some parenthesis any where you like!.

Definition of Associative Property with examples and non exampleswww.mathwarehouse.com › dictionary

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Then the factors are just (a+j)(a+k), in this case:

(a+2)(a+6)

So the missing term was 6
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Step-by-step explanation:

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3 years ago
a) The mean age of graduate students at a University is at most 31 y ears with a standard deviation of two years. A random sampl
kari74 [83]

Answer:

A.)

H0: μ ≤ 31

H1: μ > 31

B.)

H0: μ ≥ 16

H1: μ < 16

C.)

Right tailed test

D.)

If Pvalue is less than or equal to α ; we reject the Null

Step-by-step explanation:

The significance level , α = 0.01

The Pvalue = 0.0264

The decision region :

Reject the null if :

Pvalue < α

0.0264 > 0.01

Since Pvalue is greater than α ; then, we fail to reject the Null ;

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B.)

H0: μ ≥ 16

H1: μ < 16

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Alternative hypothesis, fluid contains less than 16

One sample t - test

C.)

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H0 : μ ≤ 12

. The direction of the sign in the alternative hypothesis signifies the type of test or tht opposite direction of the sign in the null hypothesis.

Hence, this is a right tailed test ; Alternative hypothesis, H1 : μ > 12

d.)

If Pvalue is less than or equal to α ; we reject the Null.

3 0
2 years ago
Is 11,13,17 a right triangle
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Answer:

no

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We can use the Pythagorean theorem to check

a^2 +b^2 = c^2

11^2+13^2 = 17^2

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This is not a right triangle

3 0
3 years ago
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