Answer:
z=-75/17
Step-by-step explanation:
Expand this equation:
-4z+8+4=-21z-63
-4z+21z=-63-8-4
17z=-75
z=-75/17
Answer:
4900
Step-by-step explanation:
70^2 means 70*70
70*70=4900
Answer:

Step-by-step explanation:
We have:



Answer:
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given the ratio
5 m : 20 m ← divide both parts by 5
= 1 : 4
=
← as a fraction in simplest form