I think it would be 8-3, not 7. 8x - 2x + 5x = (8-5)x + 5x
Answer: Your answer is B.840
Step-by-step explanation:
What you do first is the exponents 10^2 is 100
8.4 x 100 is 840 because when you multiply you move the decimal points the amount of zero's you have to the right but when you divide you do the opposite. You go left the amount of zeros there are.
By=x+2, as this is the only equation that shows the relation between 2 variables
