Which linear equations have one solution? Check all that apply. 5x-1 = 3(x+ 11)
04(x-2) + 4x = 8(x-9)
04(x-6) + 4 = 2(x-3)
O 2(x-4) = 5(x - 3) + 3
O2(x - 1) + + 3x = 5(x - 2) + 3

19.side- angle- side

20. angle- side- angle

step-by-step explanation:

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)

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: