Answer:
Amy has 12 5¢ coins
Step-by-step explanation:
Let <em>x</em> represent 20¢ coins and <em>y</em> represent 5¢ coins.
Amy has four more 20¢ coins than 5¢ coins. Hence:

And the total value of all her coins is $3.80. Thus:

This yields a system of equations:

We can solve by substitution. Substitute the first equation into the first:

Distribute:

Combine like terms:

And divide both sides by 0.25. Hence:

Thus, Amy has 12 5¢ coins.
Using the first equation:

Substitute:

Thus, Amy has 16 20¢ coins.
In conclusion, Amy has 12 5¢ coins and 16 20¢ coins.
Answer:
11
Step-by-step explanation:
first divide 715 and 13, which is 55
then you divide 605 and 55, which is 11
so he drove 605 miles in 11 hours.
The slope is 3.5, also known as 3 1/2.
If mr Gurney purchased 5 dozen eggs it would be 9.55
Answer:
Step-by-step explanation: it's about 1% of the population world that is of car accident