5. 5x-7=-14 + 8x Solve for x
2 answers:
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Add 165 to 245. That is a total of 410kWh.
245kWh is more than 50% of 410kWh.
So, according to the plan, you will pay NightTimer rate for kWh at night and DayTimer rate during the day.
The work done:
The raw, accurate, answer is that the value to pay is $22.08085.
In real terms, it is closer to your $22.08 option. That is the one I'd take.
Answer:
See below for answers and explanations (with attached graph)
Step-by-step explanation:
It helps to transform the equation into vertex form by completing the square because it tells us a lot about the characteristics of the parabola:
Since vertex form is , we identify the vertex to be
and the axis of symmetry to be
. The y-intercept can be found by setting
and evaluating:
Hence, the y-intercept of the parabola is , or
as an ordered pair.
