Answer: 
<u>Step-by-step explanation:</u>
y = A cos (Bx - C) + D
- A = amplitude (vertical stretch)
- Period = 2π/B
- C/B = phase shift
- D = vertical shift
The minimum is -7 and the max is 7 so A = 7 and D = 0
Period is 7. Since P = 2π/B then 7 = 2π/B --> B = 2π/7
Nothing was stated about a phase shift so you can use any value for C. I chose C = 0.
Now, input A = 7, B = 2π/7, C = 0, & D = 0 into the equation

Answer:
-2 < x < 7
Step-by-step explanation:
And implies intersection
x can be anything greater than -2 but it also has to be less than 7.
Therefore between -2 and 7
The answer is 2/3 , you go up 2 and to the right 3 which means it is a positive slope of 2/3.
Answer:
A) 216
B) 64.5
Step-by-step explanation:
40
x 5.40
___________
You can solve it like that, I don't remember what it is called.