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Lady_Fox [76]
3 years ago
8

3. If Jeff is walking 2 miles per hour (mph), how far can he travel in 1 hour?

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
4 0
Jeff can travel 2 miles in one hour
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Suppose that y varies inversely with x, and y=4 when x=7. What is an equation for the inverse variation
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Step-by-step explanation:

The formula for inverse variation is

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The equation is xy = 28

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Answer:

{ \rm{4x - 3y = 12 -  -  -  \{eqn(a) \}}} \\ { \rm{4x - 5y =  - 4 -  -  -  \{eqn(b) \}}}

• subtract eqn(b) from eqn(a);

{ \underline{ \rm{  - \binom{4x - 3y = 12}{4x - 5y =  - 4} }}} \\ { \rm{0x + 2y = 16}} \\  \\ { \rm{2y = 16}} \\  \\ { \boxed{ \tt{ \:  \: y = 8 \:  \:   }}} \\

• find x :

{ \rm{4x - 3y = 12}} \\ { \rm{4x - 3(8) = 12}} \\ { \rm{4x = 36}} \\  \\ { \boxed{ \tt{ \:  \: x = 9 \:  \: }}}

8 0
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Read 2 more answers
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