Decide What Values of the Variable Cannot Possibly Be Solutions $\frac { 24 } { 7 } \mathrm { hr }$

question 278

Multiple Choice

Decide what values of the variable cannot possibly be solutions for the equation.
-Martha can rake the leaves in her yard in 6 hours. Her brother can do the job in 8 hours. How long will it take them to do the job working together?

• A) \(\frac { 24 } { 7 } \mathrm { hr }\)
• B) \(\frac { 48 } { 2 } \mathrm { hr }\)
• C) \(\frac { 1 } { 14 } \mathrm { hr }\)
• D) \(\frac { 1 } { 48 } \mathrm { hr }\)

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