Answer:
-11.01 or -11
Step-by-step explanation:
x-10x=100
1x-10x=100
-9x = 100
-9x/-9 =100/-9
x = -11.01
No calculator used
Answer:
X=1, Y=2
Step-by-step explanation:
In the attached file
Answer:

Step-by-step explanation:
when dividing subtract the exponents
4^2 ÷ (3 + 1)
= (4×4) ÷ (4)
= 4×(4÷4)
= 4×1
= 4
The first option is your answer.
Sigma notation is just a fancy way to shorten a sum of a series of numbers using a set equation. The "n =" tells you where to start in the sequence and the top number tells you where to stop.