-a - 8b
If a = 9 and b = -4, then just plug them into the equation.
-(9) - 8(-4)
-9 + 32
23 would be your answer. Hope this helped!
-TTL
Answer:
A. B. D.
Explanation:
The major reasons why the U.S was involved was because german unrestricted submarine warfare destroyed allied ships carrying american passengers.
The transcontinental railroad was a key role in the industrial revolution because it was the only way for supplies to get from one part of the country to the other. The train was also the fastest mode of transportation at the time so it was also important for travel. I hope this helped.
Answer:
C. Its effects stopped all advancements in science and medicine for the next two centuries.
Explanation:
Hope this helps
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