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diamong [38]
3 years ago
7

Which value must be added to the expression x2 + 12x to make it a perfect-square trinomial?

Mathematics
2 answers:
777dan777 [17]3 years ago
7 0
<span>x^2 + 12x + 36 = (x +6)^2

answer
36</span>
Kipish [7]3 years ago
4 0
X^2+12x=0
(ax^2+bx)=0
(b/2)^2=(12/2)^2=(6)^2=36
x^2+12x+36=(x+6)^2
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Estimate the following deference using front-end estimation.PLS HURRY!<br><br> 788.44 - 225.6
AfilCa [17]

Answer:

562.84

Step-by-step explanation:

788.44-225.6 = 562.84

Srry if I'm worng

5 0
3 years ago
In an experiment to determine whether there is a systematic difference between the weights obtained with two different mass bala
Maslowich

Answer:

H0: μd=0 Ha: μd≠0

t= 0.07607

On the basis of this we conclude that the mean weight differs between the two balances.

Step-by-step explanation:

The null and alternative hypotheses as

H0: μd=0 Ha: μd≠0

Significance level is set at ∝= 0.05

The critical region is t ( base alpha by 2 with df=5) ≥ ± 2.571

The test statistic under H0 is

t = d/ sd/ √n

Which has t distribution with n-1 degrees of freedom

Specimen        A               B           d = a - b         d²

1                     13.76        13.74         0.02           0.004

2                    12.47        12.45          0.02         0.004

3                    10.09        10.08           0.01        0.001

4                       8.91       8.92          -0.01          0.001

5                     13.57      13.54           0.03        0.009

<u>6                     12.74      12.75          -0.01        0.001</u>

<u>∑                                                      0.06         0.0173</u>

d`= ∑d/n= 0.006/6= 0.001

sd²= 1/6( 0.0173- 0.006²/6) = 1/6 ( 0.017294) = 0.002882

sd= 0.05368

t= 0.001/ 0.05368/ √6

t= 0.18629/2.449

t= 0.07607

Since the calculated value of t= 0.07607 does not falls in the rejection region we therefore accept the null hypothesis at 5 % significance level . On the basis of this we conclude that the mean weight differs between the two balances.

3 0
3 years ago
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Dvinal [7]

Answer:

true

Step-by-step explanation:

8 0
3 years ago
draw two different math mountains with a total of 13. explain why you can make two different math mountains
nordsb [41]
You would make two mountains because you need to compare the two factor mountains
6 0
3 years ago
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neonofarm [45]

Answer:sorry i cant

Step-by-step explanation:

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