How many solutions does this linear system have? y = 2x – 5

–8x – 4y = –20

A- one solution: (–2.5, 0)
B- one solution: (2.5, 0)
C- no solution
D- infinite number of solutions

If a =6, what is the value of 2a(3b + 5c)?

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655