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Damm [24]
3 years ago
9

Can anyone work out number 2 and 4 thanks :)

Mathematics
1 answer:
olga55 [171]3 years ago
8 0
2. Is a Function and oof kinda forgot the rest sorry
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Assume that adults have IQ scores that are normally distributed with a mean of and a standard deviation . Find the probability t
Tcecarenko [31]

Answer:

the probability when the IQ is lower than 136 is 0.9641

Step-by-step explanation:

Given that

The mean is 100

The standard deviation is 20

We need to find out the probability when the IQ is lower than 136

So,

z value equivalent to 136 = (136 - 100)  ÷ 20 = 1.8

Now  

p (z < 1.8) = 0.9641

hence, the probability when the IQ is lower than 136 is 0.9641

3 0
3 years ago
Shaun is 4 years older than her sister Charmaine. If the sum of their ages is 16, how old is Charmaine?
skad [1K]

Step-by-step explanation:

let \: the \: age \: of \: charmaine \: be \: x

according \: to \: question

4 + x = 16

x = 16 - 4

12

so \: the \: age \: of \: shaun \: is \:

x + 4

12 + 4

16

hope it helps if it helps don't forget to like and mark me

4 0
3 years ago
Who is correct alex or jo
Dimas [21]

Answer:

D

Step-by-step explanation:

Neither Alex nor Jo are correct, because surface area is a 2-dimensional quantity, so it would be given in just square units, not linear nor cubic.

4 0
3 years ago
Help me does anybody know this?
hichkok12 [17]

Answer:

im pretty sure all you have to do is switch the signs (if its negative it will become positive) but only for the points on the x axis so basically (-12,13) would become (12,13)

6 0
3 years ago
Max is 24 years older than his son, Liam. In two years, Liam will be half as old as Max. How old is Liam now?
spayn [35]
Let Liam's age= x
Max's age= 25
After two years Max's age= 25+2
After two years Liam's age= x+2
After two years Liam will be half of MAx's age,
So- 
     x+2= \frac{25+2}{2}  \\ x+2= \frac{27}{2}  \\ x= \frac{27}{2} -2 \\ x=13.5-2 \\ x= 11.5 \\ &#10;Liams age= 11.5

Liam's age after 2 years= 11.5 + 2= 13.5
Max's age after 2 years - 27
13.5 is half of 27 answer

Hope I helped~!
7 0
3 years ago
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