Answer:
$40
Step-by-step explanation:
You are going to want to use the simple interest formula for this.
<em>I = interest amount </em>
<em>P = principal amount </em>
<em>r = interest rate (decimal form) </em>
<em>t = time</em>
<em />
First, change 2% into its decimal form:
2% -> -> 0.02
Next, plug in the values into the equation as shown below:
Keisha earned $40 worth of interest after the first 4 years.
Answer: The correct option is A.
Explanation:
The system of equations is,
When solving this system of linear equations with the elimination method, we can multiply the bottom equation by 3.
This step works because according to the multiplication property of equality,
If,
... (1)
Multiplied both side by m then,
..... (2)
Then (1) and (2) are equivalent equations.
So, by multiplication property of equality, the second equation can be multiply by 3.
Therefore, he correct option is A.
You need to subtract everything to the left side and set it equal to zero. Combine like terms.
Then, the coefficient of x^2 is a, the coefficient of x is b, and the constant term is c.
4x^2 - 5 = 3x + 4
4x^2 - 3x - 5 - 4 = 0
4x^2 - 3x - 9 = 0
a = 4; b = -3; c = -9