X= 1,-3 If you factor equation you get x-1=0 and x+3=0
The expression is a bit invalid. You can't add variables by variables.
Answer:
C
Step-by-step explanation:


Answer: 121
Answer:
1st = 4×10 ^-9
2nd= 4×10^1
3rd = 4×10^7
4th = 4×10^-5
Step-by-step explanation:
for whole numbers you just have to count from the ending till the number indicated beside the x10
for decimals you count from the front starting at the decimal till you cover the whole number