Marcy loves to do puzzles. Last week, she spent 2 hours putting together a puzzle with 300 pieces. This week, she wants to put together a puzzle with 450 pieces. If she keeps the same pace, how many hours should it take Marcy to put the puzzle together this week?

It should take Marcy 3 hours to complete the 450 piece puzzle.

Step-by-step explanation:

We know that it takes Marcy 2 hours to finish a 300 piece puzzle. When we divide each part in half we get it takes Marcy 1 hour to do a puzzle that is 150 pieces. Then, we can add those parts together, getting 450 puzzle pieces, and 3 hours.

y -5 = (-1/4)(x + 8)

step-by-step explanation:

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,