Answer:

Step-by-step explanation:
If you add a number that is negative, you are basically subtracting it.
This means that

Since they both have the same denominator, you can easily subtract the fractions: 
Find the change
the change is 63-21=42
42 degrees in 12 hours
we want to find xdegrees/1hour
42/12=3.5 degrees per hour
Answer:
Number of people employed this year = 373
Step-by-step explanation:
Let the number of employees this year = x
These employees were decreased by 4% then the remaining number of employees this year = x - (4% of x)
= x - 0.04x
= 0.96x
If last year number of people employed were 389 then the number of people employed this year = 0.96×389
= 373.44
When rounded to whole number, number of people employed this year = 373.
Answer:
we conclude that the 'bait and switch' technique is not a promotional tactic used by a seller.
Hence, 'a' is the correct option.
Step-by-step explanation:
From the given options, the 'bait and switch' technique is not a promotional tactic used by a seller.
'Bait and switch' is a deceptive sale practice using which the sells try to attract (bait) the customers by offering attractive prices on certain items, but when the customers tend to go to the shop to buy the items, they witness the unavailability of the goods, or find the prices go higher compared to what they had been offered.
Now, since the customers are already present at the shop, the sellers try to pressurize the customer so that they could buy something else.
Therefore, we conclude that the 'bait and switch' technique is not a promotional tactic used by a seller.
Hence, 'a' is the correct option.