Dara buys a small drink for $1.75. A large drink costs 1.6 times as much as a small drink. How much does a large drink cost?
2 answers:
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Answer:
The value of cosθ is
Step-by-step explanation:
It is given that an angle θ with the point (15, −8) on its terminating side.
Here x=adjacent side=15 units and y=opposite side =-8 units,
Using pythagoras theorem,
Cosine is defined as
Therefore the value of cosθ is .
Answer:
Step-by-step explanation:
We need to write a quadratic equation so we can use standard quadratic equation:
Plug the given points to get three equations.
for (7,4), we plug x=7 and y=4
...(i)
similarly using other two points, we get:
...(ii)
...(iii)
Now we solve those three equations by any method like substitution, or matrices or by any method and get:
Now plug these values into , we get final equation as: