Answer:
p equals 7
Step-by-step explanation:
6p + 6 = 13 + 5p
you subtract 6 from 13 and 5p from 6p
p = 7
Answer:
its 40
Step-by-step explanation:
180-100=80
80/2= 40
Answer:
Approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956
Step-by-step explanation:
The formula to use to solve this question is called the Confidence Interval formula.
Confidence interval =
x ± z × ( σ/ (√n) )
Where:
x = the sample mean = 130
z = the z-value for 90% confidence = 1.645
σ = standard deviation = 7
n = sample size = 145
130 ± 1.645 × (7/√145)
130 ± 0.9562687005
130 - 0.9562687005 = 129.0437313
130 + 0.9562687005 = 130.9562687005
Therefore, approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956
Answer:
x
−
y
+
4
=
8
6
x
+
2
y
=
8
x
+
6
y
=
5
Step-by-step explanation:
