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Semmy [17]
3 years ago
11

Which pair of ratios form a proportion? A) 7:11 and 35:44 B) 9:12 and 27:48 C) 11:7 and 33:21 D) 15:8 and 45:16

Mathematics
2 answers:
sasho [114]3 years ago
6 0
Im sure that it is A: 7:11 and 35:44
kotegsom [21]3 years ago
4 0
I believe A, if you divide 35 by 5 you get 7 and 44 by 4 and you get 11.
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Yuliya22 [10]

The table is missing in the question. The table is attached below.

Solution :

Let X = appraised value

    Y = area (square feet)

The regression line is given by :

$\hat y = b_0+b_1X$

$b_1=\frac{n\sum XY-\sum X \sum Y}{n \sum X^2-(\sum X)^2}$

   $=\frac{15(5964990)-(2157)(33370)}{15(404799)-(2157)^2}$

  $=12.3267$

$b_0=\frac{\sum Y}{n}-b_1\frac{\sum X}{n}$

   $=\frac{33370}{15}-\left(12.3267 \times \frac{2157}{15}\right)$

  $b_0=452.0841$

The regression line is :

$\hat Y = 452.0841+12.3267 X$

To estimate the error variance, we have:

Error variance, $\sigma =\sqrt{\frac{\sum (Y-\hat Y)^2}n-2{}}$

                           $=\sqrt{\frac{587682.3}{15-2}}$

                            $=212.6178$

8 0
3 years ago
Pls HELP meeee. My child needs some real help I I wish I would’ve took those college lessons.
Ksenya-84 [330]
I think the answer would be 75%, meaning that the orange juice would have a greater percentage of water.
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Alborosie
I think the answer is B
7 0
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BRAINLIEST TO FIRST RIGHT!!!!!!!!!!!<br> oof, all caps lol:)
Murljashka [212]

Answer:

x^2 = 121

x = 11   Im wanting brainliest

Step-by-step explanation:

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3 years ago
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I’m having trouble doing this one can someone finish the rest
kolbaska11 [484]

Answer:

2

Step-by-step explanation:

12-2=m(2+3)

m=10/5=2

m=2

6 0
3 years ago
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