Olivia wrote the following steps to solve a pair of equations: step 1: y = −x − 4 y = 3x + 3 step 2: 3y = −3x −12 y = 3x + 3 which of the following shows the correct next step to solve the equations by eliminating x? 4y = –9 4y = –4 4y = –15 4y = –36

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

Find the area of the regular hexagon if a side is 20 cm.

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?