The numbers of trading cards owned by 9 middle-school students are given below. (Note that these are already ordered from least to greatest.)
402, 429, 437, 451, 455, 497, 509, 546, 549
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Suppose that the number 549 from this list changes to 441. Answer the following.
(a) What happens to the median?
It decreases by
.
It increases by
It stays the same.
(b) What happens to the mean?
It decreases by
It increases by
0
It stays the same.
х
S
?

a

step-by-step explanation:

given the 2 equations

- x + y = - 2 → (1)

2x - 3y = 4 → (2)

multiplying (1) by 2 and adding to (2) will eliminate the x- term

- 2x + 2y = - 4 → (3)

add (2) and (3) term by term

(2x - 2x) + (- 3y + 2y) = (4 - 4), simplifying gives

- y = 0 ⇒ y = 0

substitute y = 0 in either of the 2 equations for corresponding value of x

substituting in (2) gives

2x = 4 ( divide both sides by 2 )

x = 2

solution is (2, 0 ) → a

question: the type of image formed by a convex lens is determined by the objects?

answer: it depends on the shape of the lens and the position of the object.

explanation: because if it was not positioned correctly it would have a diffrent image of what you were expecting to see

question answered by

(jacemorris04)