Answer:
it is -12
Step-by-step explanation:
0.25=y. Need an explanation?
Answer:
A= 3
Step-by-step explanation:
4a - 7 = 5
move the constant to the right
4a= 5+7
divide
4a=12
Awnser:
A= 3
The answer is the last one; to express very large or small numbers.
We use it so we can show big or very small numbers in an easier way.