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scoundrel [369]
3 years ago
12

Evaluate the expression 7^2/ x^2 - 2 for x = 3

Mathematics
1 answer:
vovikov84 [41]3 years ago
4 0

Answer:

7

Step-by-step explanation:

7²/x²-2 when x=3

49/3²-2

49/9-2

49/7

answer=7

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X-3/4 = 2x-9/7<br><br> Please answer it I’ll mark your answer as BRAINLIEST
lidiya [134]
<h3><u>Answer</u> :</h3>

:\implies\sf\:x-\dfrac{3}{4}=2x-\dfrac{9}{7}

:\implies\sf\:\dfrac{9}{7}-\dfrac{3}{4}=2x-x

:\implies\sf\:\dfrac{36-21}{28}=x

:\implies\boxed{\bf{\red{x=\dfrac{15}{28}}}}

7 0
3 years ago
Read 2 more answers
Simplify the expression: 6 + 3(x + 4) A 6 + 3x + 12 B 9x + 36 C 3x + 18 D 9x + 4
zepelin [54]

Answer:

C

Step-by-step explanation:

6 + 3(x + 4)

= 6 + 3x + 12

= 3x + 18

5 0
3 years ago
An analyst tested the null hypothesis µ ≥ 30 against the alternative hypothesis that µ &lt; 30. The analyst reported a p-value o
hoa [83]

Answer:

For significance levels lower than 0.07, the null hypothesis would be rejected.

Step-by-step explanation:

Decision regarding the null hypothesis:

The decision depends on the p-value of the test.

If the p-value of the test is less than the significance level, the null hypothesis is reject.

If the p-value of the test is more than the significance level, the null hypothesis is not reject.

The analyst reported a p-value of 0.07. For what significance level of will the null hypothesis would be rejected?

From the theory above, for significance levels lower than 0.07, the null hypothesis would be rejected.

8 0
3 years ago
Help please<br>solve for x​
adoni [48]

Answer:

X = 60°

Step-by-step explanation:

the angle you are looking for is a corresponding angle to the angle given (121°)

2x + 1 = 121

121 - 1 = 2x

121 - 1 = 120

2x = 120

120/2 = 60

X = 60

6 0
3 years ago
Solve for x, ab and bc
Savatey [412]

Answer:

x = 5

AB = 26

BC = 39

Step-by-step explanation:

A___B___C

AC = AB + BC

65 = (5x+1) + ( 7x+4 )

65 = 12x + 5

12x = 65-5

12x = 60

x = 60/12

x = 5

AB = 5x +1 = 5(5) +1 = 25 +1 = 26

BC = 7x+4=7(5) + 4 = 35 +4 = 39

I hope I helped you^_^

7 0
3 years ago
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