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andreev551 [17]
3 years ago
15

Evaluate 6 squared - 9 / X when x equals 3

Mathematics
2 answers:
Hatshy [7]3 years ago
3 0

Answer:

33 if evaluate means solve

Alja [10]3 years ago
3 0
It’s 33 I think so if you agree thank you
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I think i may have the answer but im not sure. if you answer thanks sm :)
dalvyx [7]

Answer:

F

Step-by-step explanation:

3(5) would be the equivalent of 3*5, adding the + n.

8 0
3 years ago
Independent random samples from two regions in the same area gave the following chemical measurements (ppm). Assume the populati
Basile [38]

Answer:

d. The interval contains only negative numbers. We cannot say at the required confidence level that one region is more interesting than the other.

Step-by-step explanation:

Hello!

You have the data of the chemical measurements in two independent regions. The chemical concentration in both regions has a Gaussian distribution.

Be X₁: Chemical measurement in region 1 (ppm)

Sample 1

n= 12

981 726 686 496 657 627 815 504 950 605 570 520

μ₁= 678

σ₁= 164

Sample mean X[bar]₁= 678.08

X₂: Chemical measurement in region 2 (ppm)

Sample 2

n₂= 16

1024 830 526 502 539 373 888 685 868 1093 1132 792 1081 722 1092 844

μ₂= 812

σ₂= 239

Sample mean X[bar]₂= 811.94

Using the information of both samples you have to determina a 90% CI for μ₁ - μ₂.

Since both populations are normal and the population variances are known, you can use a pooled standard normal to estimate the difference between the two population means.

[(X[bar]₁-X[bar]₂)±Z_{1-\alpha /2}* \sqrt{\frac{Sigma^2_1}{n1}+\frac{Sigma^2_2}{n_2}  }]

Z_{1-\alpha /2}= Z_{0.95}= 1.648

[(678.08-811.94)±1.648*\sqrt{\frac{164^2}{12}+\frac{239^2}{16}  }]

[-259.49;-8.23]ppm

Both bonds of the interval are negative, this means that with a 90% confidence level the difference between the population means of the chemical measurements of region 1 and region 2 may be included in the calculated interval.

You cannot be sure without doing a hypothesis test but it may seem that the chemical measurements in region 1 are lower than the chemical measurements in region 2.

I hope it helps!

6 0
3 years ago
Three houses are mapped on a coordinate grid. Joshs house is located on red street at (-5,-4). Sarah’s House is located on green
vlada-n [284]

Answer: 90

Step-by-step explanation:

5 0
3 years ago
— Зу + 5х = 26<br> - 2 - 5x = -16<br> y =
IgorC [24]

Answer:

y= -4

Step-by-step explanation:

-3y + 5x = 26

  0y -5x = -14  

____________

    -3y = 12

       y = -4

3 0
3 years ago
Find the slope of the line that passes through (-28, 100) and (-29, 1).​
Zanzabum

Answer:

99

Step-by-step explanation:

8 0
3 years ago
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