Answer:
Subsitution
Step-by-step explanation:
We have the equations:
x=2y-1
3x+y=11
The 3 methods of solving systems of equations are:
graphing
substitution
addition/elimination
Graphing involves graphing the two equations and finding their point of intersection, which is the answer
Substitution involves isolating one of the variables in one of the equations, then substituting the resulting expression into the other equation to find both numbers
Addition/Elimination involves adding the two equations together to clear a variable, solving for the other variable, and substituting the answer to the first variable in one of the equations to find the value of the cleared variable from before
Since we have x already isolated onto one side in the first expression, we can easily substitute it as 2y-1 in the second equation.
Therefore, substitution is the best method to solve this graph.
hope this helps!
Answer:
<em>$170</em>
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Step-by-step explanation:
Given that:
One time fee for the use of trash dumpsters = $50
Charges for demolition per hour = $15
Time period for which trash dumpsters are used per day = 8 hours
To find:
The cost of 8 hours of operation = ?
Solution:
Here, to find the required cost, we need to first multiply the number of hours with the per hour cost of using the trash dumpsters.
And then we need to add the fixed / one time cost of the trash dumpsters to find the required cost.
Cost for using it for 8 hours =
Total cost for using it for full 8 hours = Cost for using it for 8 hours + One time cost = $120 + $50 = <em>$170</em>
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Therefore, the answer is: <em>$170</em>