The expression \( 3 b+5 \) is equal to \( \square \) for \( b=-25 \) (Type an integer or a decimal.)

ii) \( \frac{p^{2} q-p q^{2}}{p^{2}-q^{2}} \)

5) \( m+p \div 5 ; \) use \( m=1 \), and \( p=5 \)

\( z(x+y) ; \) use \( x=6, y=8 \), and \( z=6 \)

Determinar si es falso o verdadero: Sean \( H_{1} \) y \( H_{2} \) subespacios de un espacio vectorial \( V \). Entonces \( H_{1} \cap H_{2} \) es un subespacio de \( V \).

A bus driver has a tax credit of \( € 60 \) a week and pays income tax on all his wages standard rate of \( 20 \% \). If he pays \( € 140 \) in income tax for the week, find his gross weekly wage.