The store's selling price is 1 .25 times the original cost so to wok out how much the phone costs you times 40 by 1.25 which gives you $50
Answer:
x
Step-by-step explanation:
Using the trigonometric identities
1 + tan²x = sec²x and 1 - sin²x = cos²x
secx = ![\frac{1}{cosx}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bcosx%7D)
Given
![\frac{1-sin^2x}{1+tan^2x}](https://tex.z-dn.net/?f=%5Cfrac%7B1-sin%5E2x%7D%7B1%2Btan%5E2x%7D)
= ![\frac{cos^2x}{sec^2x}](https://tex.z-dn.net/?f=%5Cfrac%7Bcos%5E2x%7D%7Bsec%5E2x%7D)
= ![\frac{cos^2x}{\frac{1}{cos^2x} }](https://tex.z-dn.net/?f=%5Cfrac%7Bcos%5E2x%7D%7B%5Cfrac%7B1%7D%7Bcos%5E2x%7D%20%7D)
= cos²x × cos²x
=
x
Answer:
Domain: ( -∞ , ∞ )
Range: ( -∞ , 4 ]
Step-by-step explanation:
Hi there!
The domain tells us the possible x-values of a function. Because there are arrows at the end of each side, it means the graph is travelling infinitely to both the left and the right side. This means the the domain is all real numbers, meaning that for any value of x, there is a real value for y.
( -∞ , ∞ )
The range tells us the possible y-values of a function. Both sides of the graph are travelling infinitely downwards, starting from 4.
( -∞ , 4 ]
I hope this helps!
Answer:
y = -5x + 7
Step-by-step explanation:
Answer:
for A plug in those numbers on the right and on the left start with 1 and move up(for example 1,2,3,4,5...)
For b the answer is 2.5x²−4.5x+1.
Step-by-step explanation: