Respuesta :
No the distributive property can't be used due to that 7x can't be distributed to 10 and 5 if there was a constant u can use distributive property.
Yes [tex]a(b+c)=ab+ac[/tex] can be used here.
[tex]7(10+(-5))=\boxed{7\cdot10-7\cdot5}=70-35=\boxed{35}[/tex]