Answer:
B
Step-by-step explanation:
You can just move upper y equation and it will be:
6x+3(3x-5)=15
6x+9x-15=15
15x-15=15
15x=30
x=2
Answer:
27/4
Step-by-step explanation:
Answer:
your answer is D.
-3 -2 -1
0 3 6
Step-by-step explanation:
the number on the left of the indicated operation is the original set
the number '3' next to R shows that you need to multiply certain numbers by 3
the subscript on the R's shows which row the multiplication needs to be done on...
in this case the row is 2, and you need to multiply it by 3
so the first row will stay the same: -3 -2 -1
but the second row will change to: 0 3 6
Since the order of the selection of files does not matter, this is the concept of combination not permutation.
therefore suppose we want the combination of 5 files that can be selected from 14. This will be given by:
14C5
=(14!)/(9!3!)
=2002
We therefore conclude that there are 2002 ways that 5 files can be selected from 14 files;
Answer:
3 hours
Step-by-step explanation:
y = mx + b
for each hour you are charged 15 dollars. for every 1 hour, you are charged $15.
y = 15x
you must also add the base fee of 35
y = 15x + 35
if you know that y = 80,
80 = 15x + 35
solve for x
x = 3
