Which of these strategies would eliminate a variable in the system of equations?
\begin{cases} -7x + 2y = 5 3x - 5y = -5 \end{cases}
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−7x+2y=5
3x−5y=−5

The solution for given equations and are x = -0.517 and y = 0.6896.

Step-by-step explanation:

The given is,

                            ..........................(1)

                              ........................(2)

Step:1

         Equation (1) is multiplied by 5    ( Eqn(1) × 5)

                        .........................(3)

         Equation (2) is multiplied by -2  ( Eqn (2) × -2 )

                          .........................(4)

Step:2

         Subtract the equation (3) and (4),

                ( - )

                                          x = -0.517

          From the x value equation (2) becomes,

                                            y = 0.6898

Step:3

          Check for solution,

                                ..........................(1)

                                             5 = 5

Result:

         The solution for given equations and are x= -0.517 and y = 0.6896.

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles