Answer:
Step-by-step explanation:
Which I think
(a+b)^7= a^7+ 7a^7b+ 21 a^6b²+ 35a^5b³+ 35 a⁴b⁴+ 21 a³b^5 + 7a²b^6 + b^7
-1.6
4x-2/5
=-8/5
=-1.6
The answer is .50
4