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3 years ago

2-[5-{4-3/2(2-2/3)} pls tell this answer

Mathematics

1 answer:

Natali5045456 [20]3 years ago

8 0

Answer:

Step-by-step explanation:

$2-[5- (4-\frac{3}{2}(2-\frac{2}{3}))} = 2 - [ 5 - (4 - \frac{3}{2}(\frac{4}{3}))]$

$=2 - [ 5 - (4 - 2)]\\= 2 - [ 5 - 2]\\=2 - 3\\=-1$

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Answer:

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Step-by-step explanation:

Given the following :

Assume a normal distribution :

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Standard deviation (sd) = 20

Find the probability that a randomly selected adult has an IQ between 88 and 122 .

Z = (x - m) / sd

For IQ score of 88:

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NARA [144]

Answer:

Step-by-step explanation:

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3 years ago

The diagram shows the rectangle ABCD, where A is (3,2) and B is (1,6).

In-s [12.5K]

(i)
$A(3,2),B(1,6)
\\
\\m_{AB}= \frac{6-2}{1-3}=-2
\\
\\m_{BC}m_{AB}=-1
\\ 
\\m_{BC}= \frac{-1}{m_{AB}} = \frac{-1}{-2}= \frac{1}{2} 
\\
\\B(1,6)\Rightarrow x_1=1,y_1=6
\\
\\BC:y-y_1=m_{BC}(x-x_1)
\\
\\y-6= \frac{1}{2}(x-1)
\\
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(ii)
$AC:y=x-1
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\\
\\C=AC\cap BC
\\
\\x-2(x-1)+11=0
\\x-2x+2+11=0
\\x=13
\\y=x-1=13-1=12
\\C(13,12)$

(iii)
$A(3,2)B(1,6),C(13,12)
\\P=2(d(A,B)+d(B,C))
\\
\\d(A,B)= \sqrt{(1-3)^2+(6-2)^2}= \sqrt{20} =2 \sqrt{5} 
\\
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3 years ago

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Citrus2011 [14]

Answer:

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Step-by-step explanation:

subtract them:

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you get

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so your solution is (6,-7).

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