Substitution is plugging one equation into the other.
Elimination is where you eliminate one equation.
Graphing is when you graph the equations and see where they overlap.
Answer:
Step-by-step explanation:
The trigonometric function secant is the reciprocal of cosine:
For :
(1)
On the other hand, it is known , hence:
(2)
In addition, it is known (3)
Substituting this on (1):
(4)
(5)
(6)
Finally:
Answer:
(24r-10)/2
Step-by-step explanation:
12r-5 multiply by 2
24r-10
Make it equivalent by adding a fraction bar
(24r-10)/2
Answer:
Same brace of length. Equal sizes.