Answer: Here are the correct answers (#10-#20):
10. 6(3+9) = (6*3)+6*9) = 18+54=72
11. 8(8+5)=(8*8)+(8*5)=64+40=104
12. (10+9)3=(3*10)+(3*9)=30+27=57
13. (12+7)5=(5*12)+(5*7)=60+35=95
14. 9(12-3)=(9*12)-(9*3)=108-27=81
15. 3(15-5)=(3*15)-(3*5)=45-15=30
16. -4(8-5)=(-4*8)+(-4*-5)=-32+20=-12
17. -7(16-8)=(-7*16)+(-7*-8)=-112+56=-56
18. 14(20-4)=(14*20)-(14*4)=280-56=224
19. 2 jeans at 32.85 per pair of jeans. 2($32.85) = $65.70
20. 6 miles per hour, 1.5 hours on Saturday + 2 hours on Sunday
=6(1.5+2)=(6*1.5)+(6*2)=9+12=21 total miles
Explanation:
Distributive property calculation used above:
a(b+c) = ab + ac