Answer:

Step-by-step explanation:
We want to write the trignometric expression:

As an algebraic equation.
First, we can focus on the inner expression. Let θ equal the expression:

Take the secant of both sides:

Since secant is the ratio of the hypotenuse side to the adjacent side, this means that the opposite side is:

By substitutition:

Using an double-angle identity:

We know that the opposite side is √(u² -100), the adjacent side is 10, and the hypotenuse is u. Therefore:

Simplify. Therefore:

Answer:
1.30
Step-by-step explanation:
When you multiply 5.20x0.25 you get 1.30
Austin should pay $75 the first month, and 37.50 for the remaining of the 2 months
Answer:
123
Step-by-step explanation: