Hi!
We will find the sum you are looking for like this:
3 * 1,19$ + 6 * 2,29$ = 3,57$ + 13,74$ = 17,31$.
Hope this helps!
True.
Since

,

and the solutions are decreasing functions.
C. 10/x+8
The easy way to do it would be to take it one step at a time.
Let the number = x
It would be: 9x + 6 = 456
9x = 456 - 6
9x = 450
x = 450 / 9
x = 50
In short, Your Answer would be 50
Hope this helps!
560+ 147= 707
14(40)= 560
14+ 14(1/2)=21
21(7)= 147