The cost of 18 pens is Rs. 150 . Find the cost of 66 such pen
2 answers:
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Answer:
Her weekly expenses amount to $25.
Detailed reasoning:
Given: Jessica earns commissions for every sale but must cover her own spending costs.
She expresses her income function as , where x represents the number of doors she approaches in a week and E(x) denotes her weekly earnings in dollars.
To determine: What are plausible meanings for the y-intercept in Jessica's earnings function?
Working it out:
x symbolizes the doors knocked per week
E(x) reflects her weekly total earnings in dollars.
Calculating the y-intercept:
Set x = 0
Given that E(x) is the net earning after expenses,
the value 25 corresponds to her weekly expenses.
Since she is responsible for covering costs,
if she makes zero sales, these expenses still apply.
Therefore, the y-intercept realistically represents her $25 weekly expenses.
Answer:
The function decreases across all real numbers x where x < 1.5.
Step-by-step explanation:
We have
This represents an upward-opening vertical parabola
The vertex denotes a minimum point
The vertex is located at (1.5,-6.25)
We know that
The function is decreasing within the interval ----> (-∞, 1.5) x < 1.5
This means----> the function is continuously decreasing for all real x values under 1.5
Conversely, the function is increasing within the interval ----> (1.5, ∞) x> 1.5
Thus, for all real x values greater than 1.5, the function is increasing
Check the attached figure for further clarification
Therefore
The true statement is
The function decreases across all real numbers x where x < 1.5.
