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$75.14. formula as follows ($79.99 - (($79.99/100)x12)) + ((($79.99/100)x12)/100)*6.75)
Answer:
vertex = (3,24) Axis of symmetry = 3
Step-by-step explanation:
Use the vertex formula to find x: x=-b/2(a)
x= 12/2(2) = 3 (this is your axis of symmetry)
Substitute 3 for x in the equation to get y: y = 42
Once you have both x and y you have your vertex.
9times sq root of 14 or 33.67492
The exact value of cos 7pi/8 is 0. 9988
<h3>How to find the value</h3>
It is important to note that the value for pi = 3. 142
= cos 7π
Substitute value of π
= cos(7× 3. 142)
= cos 21. 994
Divide 21. 994 by 8
= 2. 740
Let's find the vale of 
= 
= 
Thus, the exact value of cos 7pi/8 is 0. 9988
Learn more about trigonometric identities here:
brainly.com/question/7331447
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