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Oksi-84 [34.3K]
3 years ago
10

a father and son are digging a garden that is 7 feet wide. the father, working alone, can dig the garden in 3 hours. The son can

do the job in 4 hours. if they both work together, how long would the two need to complete the task? (round answer to the nearest tenth.)

Mathematics
1 answer:
Anna71 [15]3 years ago
3 0
There is a formula for this. (see attached)

Time = 3 * 4 / (3+4)
Time = 12 / 7
Time = <span> 1.714286 </span>
Time = <span> 1.7 (rounded)


</span>


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Answer:

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General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
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  • Left to Right<u> </u>

Distributive Property

<u>Algebra I</u>

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Step-by-step explanation:

<u>Step 1: Define</u>

R(x) = 6x - 3

S(x) = -3x - 8

<u>Step 2: Find</u>

  1. Substitute in functions:                                                                                     R(x) - S(x) = 6x - 3 - (-3x - 8)
  2. [Distributive Property] Distribute negative:                                                    R(x) - S(x) = 6x - 3 + 3x + 8
  3. [Addition] Combine like terms:                                                                        R(x) - S(x) = 9x + 5
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