Answer:
See Explanation
Step-by-step explanation:
(a) Proof: Product of two rational numbers
Using direct proofs.
Let the two rational numbers be A and B.
Such that:


The product:




Proved, because 1/3 is rational
(b) Proof: Quotient of a rational number and a non-zero rational number
Using direct proofs.
Let the two rational numbers be A and B.
Such that:


The quotient:

Express as product



Proved, because 3/4 is rational
(c) x + y is rational (missing from the question)
Using direct proofs.
Let x and y be
Such that:


The sum:

Take LCM


Proved, because 7/6 is rational
<em>The above proof works for all values of A, B, x and y; as long as they are rational values</em>
Answer:
◻️B. The value of the mode is the least value of the data.
Step-by-step explanation:
The mode is the data value that appears most often
5,7,9,5,18,6,8,5
Arranging the data from smallest to largest
5,5,5,6,7,8,9,18
The number that appears most often is 5
This is the smallest value of the data
Step-by-step explanation:
A,true
doesn't interfere with any function restriction
15.50+1.50x =26
1.50x = 10.50
x = 7
answer: he can ride 7 in one day