Radius of a circle with diameter 240mm
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Answer:
Step-by-step explanation:
Hello!
First of all, let's write some important information:
• There are 35 coins in total;
,• The total amount is $6.80.
Let's write d for dimes and q for quarters.
Writing the exercise as a linear system, we will have:
Let's isolate the variable d in the first equation:
Now let's replace it in the second equation:
As we know the number of quarters, we just have to replace it:
In the pig bank were 13 dimes coins and 22 quarter coins.