To solve this problem you must apply the following proccedure:
1. You have a total of 21 coins, all nickels and dimes. Then:
x:nickels=5 cents
y: dimes=10 cents
x+y=21
2. You have that the total value is $1.70. Then:
5x+10y=170
3. The system of equation is:
x+y=21 (i)
5x+10y=170 (ii)
4. You have:
x+y=21
x=21-y
5(21-y)+10y=170
105-5y+10y=170
y=13 dimes
x+13=21
x=8 nickels
the difference between the longest and the shortest piece
Answer:
MEDIUM JERSEY =$21
Step-by-step explanation:
MEDIUM=$X ,LARGE =$X+9, EX LARGE=$X+15
9(X+9)+4(X+15)=414
9X+81+4X+60=414
13X=414-141
13X=273
X=21
Answer:
600,700,000
10 to the eighth power is 100,000,000 so you would push 6.007 up to 6007 which is already 3 zeros used so you would add the other five to the end resulting in 600,700,000
Remark
The key to this question is to get the original price (36) down to 29.52. In other words, what % will when multiplied by 36 will result in 29.52?
Solution
36 * (x/100) = 29.52 Multiply both sides by 100
36 * x = 29.52 * 100 The 100 on the left disappears.
36 * x = 2952 The decimal disappears. Divide by 36
x = 2952/36
x = 82%
That is not your answer. That just tells you what % of 36 is that would give 29.52
Answer
The % discount is 100 - 82 = 18%. That is the % discount.
