Answer:
40
Step-by-step explanation:
5*4*2
Answer:
A trick I did when it comes to multiplying by 10, is just add a 0 at the end of the number your multiplying. Try for yourself!
<em>Answer:</em>
<em>x = (k + c)/4</em>
<em>Step-by-step explanation:</em>
<em>4x - c = k</em>
<em>4x = k + c</em>
<em>x = (k + c)/4</em>
I believe you get 10 dollars in interest.