Answer:
H0:μ=10.6
Ha:μ≠10.6
Step-by-step explanation:
you do not find out about the 12.9 until after stating the hypothesis.
Answer:
2) Exact
3) Exact
4) Exact
5) Approximation
Step-by-step explanation:
Answer:
x=9
z=73
Step-by-step explanation:
Angle 107 and 8x+35 are vertical angles, so they are equal
107 = 8x+35
Subtract 35 from each side
107-35 = 8x+35
72 = 8x
Divide by 8
72/8 = 8x/8
9 =x
We also know that 107 and z are supplementary angles since they form a straight line. This means they add to 180 degrees
107+z = 180
Subtract 107 from each side
107-107+z=180-107
z =73
Answer:
16
Step-by-step explanation:
The mean of a group of values is calculated as
mean = 
Given 5 numbers with a mean of 12, then
= 12 ( multiply both sides by 5 )
sum = 60
let the number removed be x , then
= 11 ( multiply both sides by 4 )
60 - x = 44 ( subtract 60 from both sides )
- x = - 16 ( multiply both sides by - 1 )
x = 16
The number removed was 16
Let Cameron be x years old now.
-
<u>Now:</u>
Cameron = x
Uncle =3x
-
<u>4 years ago:</u>
Cameron = x - 4
Uncle = 3x - 4
-
<u>4 years ago, Uncle is 4 times older:</u>
3x - 4 = 4(x - 4)
-
<u>Find x:</u>
3x - 4 = 4(x - 4)
3x - 4 = 4x - 16
4x - 3x = 16 - 4
x = 12
-
<u>Find the age:</u>
Cameron = x = 12
-
Answer: Cameron is 12 years old now.
