Answer:
Option D) $275
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = $235
Standard Deviation, σ = $20
We are given that the distribution of amount of money spent by students is a bell shaped distribution that is a normal distribution.
Formula:

We have to find the value of x such that the probability is 0.975
Calculation the value from standard normal z table, we have,

Approximately 97.5% of the students spent below $275 on textbook.
Answer:
b) Commutative property is true for subtraction of Rational numbers
Step-by-step explanation:
- Option B is incorrect.
- Commutative property is not true for subtraction of Rational numbers .
i believe it would be: 1/2y = x
y = 2.5
Answer,a and b, sorry if they are wrong
Answer:

Step-by-step explanation:
To find an equation of a line in point slope form when given the slope and a point we use the formula

From the question we have the final answer as

Hope this helps you