Answer:
-6125
Step-by-step explanation:
negative 78 squared = -6084
-6084 + 3 - 9 = -6090
-6090 - 5 squared minus 6 minus 4 = --6125
I got confused by "8th" and "a minus" do you mean 3a, and 6a?
Answer:
14/x = 1/7.
Step-by-step explanation:
Let x be the number:
14/x = 1/7
The mass of the first shipment at time t is

The mass of the second shipment at time t is

At time t, the ratio of m₁ to m₂ is

Therefore as a percentage,

Answer: B. 81.2%