Answer:
neither
Step-by-step explanation:
<em>Both statements are correct.</em>
If matrix 1 has dimensions (r1, c1) and matrix 2 has dimensions (r2, c2), their product can be formed if c1 = r2. The resulting product matrix will have dimensions (r1, c2).
Answer:
Suppose that A is the set of sophomores at your school and B is the set of students in discrete mathematics at your school.
a) It is the intersection A ∩ B
b) This is the difference A − B.
c) It is the union A ∪ B.
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d) It can be shown as A ∪ B. (bar over A and B both)
Answer:
The expression representing Noah’s new number is 
Step-by-step explanation:
Noah started with a number, x.
Four times the number x is 4x
The difference of four times the number and three is 4x - 3
The difference of four times the number and three cubed is 
Thus, the expression representing Noah’s new number is 