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FrozenT [24]
2 years ago
13

Which of the following equations could be the trend line of variables that have a negative correlation?

Mathematics
1 answer:
fgiga [73]2 years ago
7 0

Answer:

We will now call regression with just one explanatory variable simple linear re- ... We now think that the relationship between longevity and thorax length has ... parallel lines is s = √. 1 n − 3. ∑ residual. 2 = √. 1 n − 3. ∑. (y − ^y)2 ... Comparing these estimated regression equations with the two separate regression lines ...

Step-by-step explanation:

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Lisa sold costume jewelry at a bazaar. The first hour she sold 2 bracelets and 3 rings for a total of $36.00 later a customer bo
saw5 [17]
2x + 3(6) = 36

2x + 18 = 36

2x = 18

x = 9

answer: each bracelet costs $9
7 0
2 years ago
Find the values of the pronumerals in this diagram. Write down the reason in each case.
timofeeve [1]

Answer:

see explanation

Step-by-step explanation:

a and 85 form a straight angle and are supplementary, thus

a + 85 = 180 ( subtract 85 from both sides )

a = 95

b and 85 are vertical angles and are congruent, thus

b = 85

c and 85 are corresponding angles and congruent, thus

c = 85

c and d are vertical angles and congruent, thus

d = 85

In conclusion

a = 95, b = 85, c = 85, d = 85

5 0
2 years ago
The length of a rectangle is nine inches more than its width. Its area is 486 square inches. Find the width and length of the re
Elan Coil [88]

Answer:

  • width: 18 in
  • length: 27 in

Step-by-step explanation:

The relations between length (L) and width (W) are ...

  W +9 = L

  LW = 486

Substituting gives ...

  (W+9)W = 486

  W^2 +9W -486 = 0 . . . put in standard form

  (W +27)(W -18) = 0 . . . . factor

  W = 18 . . . .  the positive solution

The width of the rectangle is 18 inches; the length is 27 inches.

_____

<em>Comment on factoring</em>

There are a number of ways to solve quadratics. Apart from using a graphing calculator, one of the easiest is factoring. Here, we're looking for factors of -486 that have a sum of 9.

486 = 2 × 3^5, so we might guess that the factors of interest are -2·3² = -18 and 3·3² = 27. These turn out to be correct: -18 +27 = 9; (-18)(27) = -486.

3 0
3 years ago
WILL MARK BRAINLIEST IF DONE IN NEXT 2-5 MIN give me a real answer not a link or something like that
ZanzabumX [31]

Answer:

22 in year book and 42 in drama

Step-by-step explanation:

there are in the yearbook club well if you slice them in half and give drama club 10 more than year book club

5 0
2 years ago
Read 2 more answers
Please help me with these two math questions!!
Westkost [7]

Answer:

the answer would be 1/6

Step-by-step explanation:

The reason for this is because 1/12 if you simplify 1/12 you would get 1/6. the number 2 is the same answer

5 0
3 years ago
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