First, create 3 equations of the form ax+by+cz=d, where a, b, c, and d are constants (integers between – 5 and 5). for example, x+2y-z=-1. perform row operations on your system to obtain a row-echelon form and the solution

1c-2 m405 what values are needed to make each expression a perfect square trinomial? 32 + 2x+ 2-20x + 22+5x+

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school. each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220