Astudent is trying to solve the set of two equations given below: equation a: x + z = 6 equation b: 3x + 2z = 1 which of the following is a possible step used in eliminating the z-term? multiply equation a by −2. multiply equation b by 2. multiply equation a by 3. multiply equation b by 3.

Multiply equation A by -2 is correct everyone

Step-by-step explanation:

I just took the test and checked;)

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m