The answer to your answer is 220 after evaluating this expression. Hope i helped out.
Answer:
The speed of the biker is 15
Step-by-step explanation:
First, you call the speed of the walker x, and the speed of the biker 2.5x.
Then you know that speed times time equals distance, so you set up and equation. You do x times 2, which is 2x, and then 2.5x times 2, which is 5x. Then, since the distance between them is 18 miles, the equation would be 5x-2x=18. You would get 3x=18, and x is 6. So 6 is the speed of the walker, and 6 times 2.5 = 15, so the speed of the biker is 15.
z equals -1 because 8 time negative one equals negative 8 plus 8 equals 0
Answer:
Ok
Step-by-step explanation:
Answer:
See below
Step-by-step explanation:
The function 
oscillates between -1 and 1, so the range is 
.
