A) h + 2/6 = h- 3/4
<=> h - h = -2/6 - 3/4
<=> 0 = -24/24 = -1
<=> 0 = -1 ( wrong ?)
b) 2x = y + 6
6x - 2y = 13
<=> 3.2x = 3.(y + 6)
6x - 2y = 13
<=> 6x = 3y +18
6x = 2y +13
==> 3y + 18 = 2y + 13 ==> 3y - 2y = 13 - 18 <=> y = -5
We have y = -5 and 6x = 2y +13 ==> 6x = 2. (-5) + 13 = -3
<=> 6x = - 3 <=> x = -3/6 = -1/2
Answer:
a) P [ x ≤ 7000] is 0.55
b) P [ x > 5000 ] = 0.95
c) P [ 5000 < x ≤ 7000 ] = 0,5
Step-by-step explanation:
a) P [ x > 7000 ] = 0.45 straightforward P [ x ≤ 7000] is 0.55
The whole spectrum of probabilities is 1 which in this particular case is divided in two parts having 7000 as a limit, then we subtact 1 - 0.45
b) P [ x ≤ 5000] = 0.05 again we get P [ x > 5000] taking 1-0.05 to get
P [ x > 5000 ] = 0.95
c) P [ 5000 < x ≤ 7000 ]
Under Normal curve distribution the probability of x ≤ 7000 includes values smallers ( to the left of 5000) so we subtract from 0.55 - 0.05 = 0.50
c) P [ 5000 < x ≤ 7000 ] = 0,5
Step-by-step explanation:
9/10 ÷ 2/3 =. 9/10 × 3/2 = 27 / 20
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Answer:
Option c
Step-by-step explanation:
The study is an observational study. An observational study is made when the researchers collect data based on what they see, hear or observe without any form of manipulation or treatment plan from the researchers. Thus, in this case, the study is an observational study because the study examines individuals in a sample, but does not try to influence the response variable/influence their responses.
y= mx+b
(16, -7) = (x,y)
2(16) - 3y = 12
32 - 3y = 12
32 - 12 = 3y
20/3 = y
6.6 = y
2x-3(-7) = 12
2x+21 = 12
2x = 12 - 21
x = -9/2
Insert the values into y = mx + b
solve for m and then solve for b
