(2x - y = -2)2
5x - 2y = -7
4x - 2y = -4
Subtract both
x = -3
5(-3) - 2y = -7
-15 - 2y = -7
-2y = 8, y = -4
Solution: (-3,-4)
Answer:
The amplitude is 1/5
Step-by-step explanation:
Given
Required
Determine the amplitude
The general cosine function is:
Where
Compare and
So:
Answer:
f = € 0.20
k = € 2.20
Step-by-step explanation:
k + f = 2.40
k = 2 + f
(2 + f) + f = 2.40
2f = 2.40 - 2
2f = 0.40
f = € 0.20
k = 2 + 0.20 = € 2.20
:
The percent increase is found by finding the difference between the two prices and then dividing that different by the beginning price.
For this example it would be 65-39= $26. So $26/$39(the starting price) is 0.666... This is equivalent to about 66.67%. So, the price of the card increased by about 66.67%
