Answer:
Factor:
x^2+5x-300=0
(x-15)(x+20)=0
x=15 is the width
x+5=20 is the length
Step-by-step explanation:
6:3
6 tetras and 3 platies
Replace y with 31:
31 = 7x -4
Add 4 to both sides:
35 = 7x
Divide both sides by 7:
x = 5
Input x = 5
7 km
2 hours 20 minutes is 2 and 1/3 hours. 3 * 2 and 1/3 = 3 * 7/3 = 7km.
