Answer: D: 4x+3y=-6
Step-by-step explanation:
Trigonometric identity

Substituting with the secant value given:
The answer is going to be 85.
If an equation shows a relationship between x and y in which the value of y is dependent upon the value of x, y is known as the dependent variable and is sometimes referred to as 'function<span>(x)' or f(x). The final solution of the equation, y, depends on the value of x, the independent variable which can be changed.
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Answer:
a. only 21 males drink only coffee
b. 21/100