C is what you do when credit cards are involved.
Answer:
x=64
y=54
Step-by-step explanation:
3x+4y=24 4(24-4y\3)+3y=22
x=24-4y/3 96-12y\3+3y=22
x=24-4(54)/3
x=-64 96/3-22=3y/3
y=54
There is no solution for the first one
if you eliminate y you get 2 equations
-13x - 13z = -25
-13x - 13x = -15
- there is no solution to theses
a23 means the element in the second row and the 3rd column
so its -5
There are 30-18 = 12 girls. Their percentage is
... 12/30 × 100% = 40%
The answer is C because if AB=6 and BC=4 then AB is 6 and C is 4 so it can be either one of those options.
