I did this using the method of substitute the answer is the first one (5/7, 12/7)
My work is in the picture below
Answer:
5.87
Step-by-step explanation:
Answer: i^2 = -1
Step-by-step explanation:
Step-by-step explanation:
Using Pythagoras theorem:
To solve this problem, you can use a simple table to find the number of quarters and dimes:
type of coin I Quantity of coin I Value of coin (in amount of money)
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dimes I x I 10x (a dime is equal to 10 cents)
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quarters I 18-x I 450-25x (a quarter is equal to 25 cents)
After doing this table, you can form the equation:
10x + 450 - 25x = 420
-15x = -30
x = 2 dimes
18-x = 16 quarters