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15 January, 05:35

The equation C = 40x + 25 gives the cost, C, to hire a plumber for x hours.

a. What is the cost for 4 hours?

b. If the cost is $265, for how many hours did the plumber work?

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Answers (2)
  1. 15 January, 06:01
    0
    A 125

    Step-by-step explanation:

    (40x4) + 25
  2. 15 January, 06:04
    0
    Step-by-step explanation: A

    First you substitute and compute for x

    C=40x+25 goes to C = 40 (4) + 25.

    Then you multiply 40 tines 4 and get 160 and add 25 and get $165.

    Step-by-step explanation: B

    First you take tge equation c = 40 x + 25 and change it to 265 = 40x + 25.

    Then you use inverse operations and do

    265 = 40x+25 then using inverse operation you first subtract 25 from 265. Which is 240

    Then you take that 240 and divude it by 40 and get 6.

    So, x=6 hours.
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