Step-by-step explanation:
He won't answer you.
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Given:
Expression is

To prove:
If r is any rational number, then
is rational.
Step-by-step explanation:
Property 1: Every integer is a rational number. It is Theorem 4.3.1.
Property 2: The sum of any two rational numbers is rational. It is Theorem 4.3.2.
Property 3: The product of any two rational numbers is rational. It is Exercise 15 in Section 4.3.
Let r be any rational number.
We have,

It can be written as

Now,
3, -2 and 4 are rational numbers by property 1.
is rational by Property 3.
are rational by Property 3.
is rational by property 2.
So,
is rational.
Hence proved.
Answer:
x=1
Step-by-step explanation:
Step 1: Subtract 2x from both sides.
Step 2: Add 6 to both sides.
Step 3: Divide both sides by 6.
Answer:
x=1
Answer:
a) 675 b) 1050 c) 675 d)455 e) 120
Step-by-step explanation: