Answer:
a=54
Step-by-step explanation:
Because the problem gives you the value of b simply plug it in the equation a=12b. The new equation should look like this when plugged in: a=12(4.5). Now multiply 12*4.5=54. The new equation would then become a=54
Answer:
x=2
Step-by-step explanation:
Value of 
Solution set is 
Step-by-step explanation:
We need to solve the following system of equations:

We can solve this using Substitution.
Isolate x in 

Putting value of x in equation(2)

Putting value of y=1/5 in 

So, value of 
Solution set is 
Keywords: System of linear Equations
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Answer is 30
Explanation: 5x6=30
EACH= MULTIPLY
Total amount of trail mix which is poured into the bags =
pounds
=
pounds
Total amount of trail mix in each bag =
pound
Number of bags with
pound, which can be poured from
pounds of trail mix
= Total amount of trail mix
Amount of trail mix in each bag
= 
= 
= 6 bags
Number of bags taken on a hiking trip =
of bags
= 
= 4 bags
Now, number of bags of trail mix which are left = 6-4 = 2 bags.
Therefore, 2 bags are left.