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san4es73 [151]
3 years ago
9

A company can make 12 printing presses for $78,600. It can make 19 printing presses for $82,380. Find the linear equation that m

odels the cost to produce x printing presses. Use slope-intercept form
Mathematics
1 answer:
8_murik_8 [283]3 years ago
4 0

Answer:

C(x) = 540x + 72120

Step-by-step explanation:

Given

Cost = $78,600 when Printing Press = 12

Cost = $82,380 when Printing Press = 19

Required

Determine the linear equation

From the given parameters; Cost is a function of Printing Press

<em>Represent Cost by C and Printing press by x;</em>

<em>This implies that C = f(x)</em>

The given parameters can then be modeled as; (x, C)

(x_1, C_1) = (12,78600)

(x_2, C_2) = (19,82380)

The first step is to calculate the slope, m;

m = \frac{C_1 - C_2}{x_1 - x_2}

m = \frac{78600 - 82380}{12 - 19}

m = \frac{-3780}{-7}

m = 540

The linear equation can then be calculated using slope formula

m = \frac{C- C_2}{x - x_2}

Substitute 540 for m and (x_2, C_2) = (19,82380)

540 = \frac{C- 82380}{x - 19}

Multiply both sides by x - 19

540 * (x-19)= \frac{C- 82380}{x - 19} * (x-19)

540 * (x-19)= C- 82380

Open bracket

540x - 10260 = C - 82380

Add 82380 to both sides

540x - 10260 + 82380= C - 82380 + 82380

540x - 10260 + 82380= C

540x + 72120= C

C = 540x + 72120

Hence;

C(x) = 540x + 72120

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