I believe the answer would be this:
-y^2 - 21
Answer:
a. 21x-2
b. -28x-2
c. 7b-35x-2
Step-by-step explanation:
a. f(3)
7(3x)-2
21x-2
b. f(-4)
7(-4x)-2
-28x-2
c. f(b-5)
7(b-5x)-2
7b-35x-2
1) Lets say there is point A that is perpendicular to WX and has W in it.
2) To find YA, we have to 19 - 11 = 8
3) Do Pythagorean theorem to find WY, which is:

This is equal to
42.76 in decimal
The speed is 64 miles per hour
Step-by-step explanation:
Lets define speed first.
"Speed is the distance per unit time"
Speed is denoted by s.
Given
Distance = d = 160 miles
Time = t = 2.5 hours

Hence,
The speed is 64 miles per hour
Keywords: Speed, distance
Learn more about speed at:
#LearnwithBrainly