Your answer for 15 is D or C. For 16 I’m estimating 125?
To solve problems like this you can either graph or solve mathematically. To do the ladder we need to solve for one variable at a time. So lets cancel one variable out.
Multiply equation 1 by 2
This will give 4x-2y=14
Now we can get rid of y by subtracting 2 from 1
This will give x=9
Plug back in to either equation, i will use equation 2
3(9)-2y=5 simplify
-2y=-22 solve
Y=11
Is it 57? ...............................
Log(2x*12)=3
10^3=2x*12
1000=24x
1000/24=x
x=41.667
