Answer:
N = -1/2
Step-by-step explanation:
We are adding in this, so we need to do the opposite to both sides, to get N by itself.
N + 3/4 - 3/4 = 1/4 - 3/4
N = -2/4 or, simplified, -1/2
Answer:
4 ft
Step-by-step explanation:

A=10 h=5

20=5b (multiply both sides by 2)
4=b (divide by 5)
Dont really understand but i think 6 idk im not really a good mathematical person but who cares im on this app for a reason.
Answer:
The 21st term is 137.
Step-by-step explanation:
Arithmetic progression:
In an arithmetic progression the difference between consecutive terms is always the same, and its called common difference.
The nth term is given by:

In which
is the first term and d is the common difference.
The first two terms are -3, 4.
This means that 
So


The 21st term is

The 21st term is 137.
Answer:
The grinding of the material
Step-by-step explanation: