Answer: 27.9 let me know if you need a another answer I hope this helps!
The percent of decrease on an item that went from $25 to $20 is 5 percent.
Answer:

Step-by-step explanation:
The formula relating distance (d), speed (s), and time (t) is
d = st
1. Calculate the distance
d = 269 s × 4.6 m·s⁻¹ = 1240 m
2.Calculate the track radius
The distance travelled is the circumference of a circle

I guess that's all you can do
to find a and b you need more information
b=-a -> a (x-3)-a (x-2)=3
a [x-3-(x-2)]=3
a (x-3-x+2)=3
a*(-1)=3
a=3:(-1)
a=-3
b=-a=-(-3)=3
Answer:
57
Step-by-step explanation:
Write and solve a proportion.
47 / 289 = x / 350
x ≈ 57