Answer: 5=4 (empty set)
Step-by-step explanation:
(-3x + 7x) + (-3+ 8) = (5x + -x) + (6+-2)
4x + 5 = 4x + 4
Each 4x cancel each other out
5=4
2 3/20 ,2 9/20, 2 1/2,2 11/20,2 4/5
Combine like terms:
n^3 + 20n^ + 10n^2
= n^3 + 30n^
Divide:
=n^3 + 30n^2/10n^2
Factor:
=n^2n + 30n^2
=n^(n + 30)
= 2^2(n + 30)/10n^2
Cancel the common factor n^2:
=n + 10/10
Set up a proprtion and cross multiply.
18/7.5=22/4x+1
7.5×22=18 (4x+1)
165=72x+18
147=72x
x=2.04
5 m/sec or 300m / min
using speed = 
change 5 min 20 sec to seconds = (5 × 60) + 20 = 320 sec
speed =
= 5m / second or
speed = 60 × 5 = 300m / minute