Answer:
Domain > 0, Range C(x) > 2
Step-by-step explanation:
x is the distance, distance is always large than 0 => x > 0
=> Domain x > 0
Multiply both sides by 0.75
=> 0.75x > 0
Add both sides by 2
=> 0.75x + 2 > 0 + 2
=> 0.75x + 2 > 2
=> Range C(x) = 0.75x + 2 > 2
2x-9=-x+6
+x +x
3x-9=6
+9 +9
3x=15
x=5
therefore the equations have one solution (x=5)
Answer:
5/y^3
Step-by-step explanation:
Answer:
x = - 2 ±
Step-by-step explanation:
To solve the equation using the method of completing the square.
Given
x² + 4x - 7 = 0 ( add 7 to both sides )
x² + 4x = 7
add ( half the coefficient of the x- term )² to both sides
x² + 2(2) x + 4 = 7 + 4
(x + 2)² = 11 ( take the square root of both sides )
x + 2 = ± ( subtract 2 from both sides )
x = - 2 ± ← exact solution
Answer: The answer is 14
Step-by-step explanation: So, for every 5 books she gets, she gets two free. Here is a chart
5 books bought=2 free books
10 books bough=4 free books
15 books bought=6 free books
20 books bought=8 free books
25 books bought=10 free books
30 books bought=12 free books
35 books bought=14 free books
Every five books bought equals two free books, so if she buys 35 she would get 14, so 49 books in all. hope this helps :)