9x40= 360
9x30= 270 so the common factor is 9 I have no idea about the exponent stuff
Six dollars is the only answer that seems correct using the graph. Hope this helped.
8.64 should be your answer
Steps:
1. Multiply what is in the parentheses
5x + 5 = 5x + 2
2. Subtract 5x on each side
3. 5=2
4. 5 doesn't equal 2 so the equation doesn't have a solution or it is not true.
C.
You can simplify 12:21 to 4:7 by dividing 12 by 3 to get 4 and by dividing 21 by 3 to get 7. Because dividing both those numbers in the one ratio by 3 gives you the other ratio, they are a proportion.
