Majoring in business administration another major taken a public speaking class 10 20
not taken a public speaking class 45 25
At a certain college, 100 students were surveyed. The results are in the two-way table above.

One of these 100 students is selected at random to give more detailed answers to some follow-up questions.

What is the probability that the chosen student has taken a public speaking class or is majoring in business administration?
Find the value of P(taken a public speaking class | majoring in business administration).

y < -3

step-by-step explanation:

-3y - 2 > 7

-3y -2 + 2 > 7+2

-3y > 9

-3y/-3 < 9/-3   (change the inequality sign when multiplying or dividing by a negative number)

y < -3

answers

\3. yes the presentation (i.e. odd numbers being written as differences of two squares) is possible for all odd natural number however the presentation may not be unique. for example,  57=112−82=292−28257=112−82=292−282.

\4. 2 can't be written as a difference of two squares because 4-1=3 and 1-1=0 and the difference of squares grows to integers larger that 3.

can i get some in proving questions 1 and 2?