You can factor out a 3t first, resulting in:

Now, let's factor the equation in the middle using the quadratic equation. Plug in the values to the quadratic equation:

Simplify, you get your
x's:

To write the equation in simplified form, you just write it this way:
That's your answer ^
Answer:
Approximately 10.5, or 10.5095541.
Step-by-step explanation:
To find the radius given the circumference of a circle, we first have to divide the circumference by pi, or an estimation of 3.14. This will give us the diameter.
Since we know that the radius of a circle is simply half the diameter, we divide the number we got from the problem above by 2. This will give you your answer!
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Its A because 25 is taken out of m=bday money m-$25