3x + 2y = 16
4x - y =29
i managed to get x but i cant seem to get y right

You found x, right?

Now, plug the value of x into either of the given equations to find y.

I found x to be 7 and y to be -1.

We can also express the answer as

(x, y) = (7, -1).

9514 1404 393

  (x, y) = (6 8/11, -2 1/11)

Step-by-step explanation:

Add twice the second equation to the first:

  (3x +2y) +2(4x -y) = (16) +2(29)

  11x = 74 . . . . simplify

  x = 74/11 = 6 8/11

Substitute this into the second equation to find y.

  4(74/11) -y = 29

  (26 10/11) - 29 = y = -2 1/11

The solution is (x, y) = (6 8/11, -2 1/11).

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

4 puzzles in 3 hours

step-by-step explanation: