Answer:
Step-by-step explanation:
Since the line passes through the origin, it must be a proportional/direct variation equation.
Direct variation equations have the form:
Where a is the constant of proportionality.
Let’s solve for a. We know that when x=5, y=40. So:
Divide both sides by 5:
Therefore, our equation is:
We want to find the value of k such that y=-24. So, subsitute -24 for y and k for x:
Divide both sides by 8:
Hence, the value of k is -3.
Answer:
$97.15.
Step-by-step explanation:
We have been given that a musician uses his credit card to pay for a new violin that costs $2,900 and does not pay on it until the second month. The interest rate of credit card is 3.35% monthly.
We will use interest formula to solve our given problem.
, where,
,
,
,
Let us convert our given interest rate in decimal form.
Upon substituting our given values in interest formula we will get,
Therefore, the monthly interest charge at the end of the 1st month will be $97.15.