HELP PLS! Perform an operation on the given system that eliminates the indicated variable. Write the new equivalent system.

2x + y − 4z = 4
2x + 4y + z = 15
6x − 3y − z = 11
Eliminate the x-term from the third equation.

2x + y − 4z = 4
2x + 4y + z = 15
= −34

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?