# Math Help - I just need confirmation for my quiz test today

1. ## I just need confirmation for my quiz test today

I just had a quiz today on quantifiers, and the question asks me to represent the statement :

all blue shirts are expensive

using logical quantifier, the domain x is all shirts

Q(x) : Shirt color x is expensive.

$\left( {\forall x} \right)$ [[Q(Blue)]

Is this right?

2. B(x) is x is blue.
Q(x) is x is expensive.

“All P is Q” is positive universal statement: $P \Rightarrow Q$.
If the shirt is blue then it is expensive.
All blue shirts are expensive:
$\left( {\forall x} \right)\left[ {B(x) \Rightarrow Q(x)} \right]$