Answer:
1.) [tex]=50x+30y[/tex]
2.? The first one
Step-by-step explanation:
1.)[tex]\mathrm{Apply\:the\:distributive\:law}:\quad \:a\left(b+c\right)=ab+ac[/tex], [tex]a=10,\:b=5x,\:c=3y[/tex]
[tex]=10\cdot \:5x+10\cdot \:3y[/tex][tex]=50x+30y[/tex]
2.) The first one
