1. true.
2. false.
3. false.
4. true.
these should be correct.
Answer:
A, 120.
Step-by-step explanation:
x-15+75=180
x+60=180
x=120.
Answer:
89.04% of the data points will fall in the given range of z = − 1.6 and z = 1.6
Step-by-step explanation:
We are given a normally distributed data.
We have to find the percentage of data that lies within the range z = − 1.6 and z= 1.6
Formula:

89.04% of the data points will fall in the given range of z = − 1.6 and z= 1.6
Answer: 4 = n
Step-by-step explanation:
5n + 34 = -2(1-7n)
Distribute negative 2 to both 1 and negative 7n. You do this first due to the rules of PEMDAS
5n + 34 = -2 + 14n
Add two to both sides of the equation in order to further isolate (n) in 14.
5n + 36 = 14n
Subtract 5n from both sides of the equation so that the values with (n) are on one side of the equation.
36 = 9n
Divide nine from 36 and 9n in order to isolate (n).
4 = n
This then gives you your final answer.