Against the wind a small plane fle 245 miles in 1 hour and 10 minutes. The return trip took only 50 minutes. What was the speed of the wind? What was the speed of the plane in still air? The speed of the plane in still air was \( \square \mathrm{mph} \). The speed of the wind was \( \square \mathrm{mph} \).

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 \( V \).

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

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.

a) \( x+5>8 \)

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