Answer:
Step-by-step explanation:

10% of $125 is $12.50.
Now 20%=2*10%.
So 20% of $125 is $25.
If you were to receive a 20% discount, you'd only have to pay $100 to bag the jump suit.
Answer:
The answer is 0.75x.
Step-by-step explanation:
If the dress is on sale for 25% off, then we know that the new sale price of the dress is x - (25/100)x = x - 0.25x = 0.75x.
Answer:
There are a total of 168 students in the school.
Step-by-step explanation:
Simply multiply the number of students per class, and the amount of classes to find your total amount of students in the school. This will be 21 times 8, which results in 168.