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marissa [1.9K]
11 months ago
5

A plumbing company charges an hourly rate of $25 for labor. If the total charge for labor on ajob came to $75.00, which of the f

ollowing equations can be solved to find the number ofhours spent on the job? Let h represent the number of hours.O (25+75) = 0O 75h=25None of the other answers are correctO 2543 750 25h= 75
Mathematics
1 answer:
Ipatiy [6.2K]11 months ago
3 0

Charge per hour: $25

Number of hours: h

Total charge: $75

So, to find the number of hours spent on the job, we have to multiply the charge per hour (25) by the number of hours (h); and that expression must be equal to the total charge (75).

Mathematically speaking:

25h=75

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Answer:

z (min)  = 705

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x₂  = 9

Step-by-step explanation:

Let´s call  x₁  quantity of food I ( in ou )  and x₂ quantity of food II ( in ou)

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x₁                 32                      9                         48

x₂                16                      18                          25

Objective function z

z  =   48*x₁   +  25*x₂        To minimize

Subject to:

1.-Total units of vit. C at least  464

32*x₁   +  16*x₂     ≥   464

2.- Total units of vit. E at least  252

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General constraints    x₁  ≥ 0    x₂   ≥ 0

Using the on-line simplex method solver (AtoZmaths) and after three iterations the solution is:

z (min)  = 705

x₁  = 10

x₂  = 9

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