Answer:
(−a+b)(−c+d)
=(−a+b)(−c+d)
=(−a)(−c)+(−a)(d)+(b)(−c)+(b)(d)
=ac−ad−bc+bd
(1.2×10^-3)/(4×10^6)
1.2/4=0.3
(10^-3)/(10^6)=10^-9
0.3×10^-9= 3×10^-10
15m + 2n, first you have to pair the matching variables, 8m and 7m along with the sign in front of them. so 8m(+7m), you would then add those then do the same with the other, +4n(postive) and -2n, so subtract 2 from 4 and get 2. put them together and it’s 15m+2
Answer:
2 hours
Step-by-step explanation:
