Y= -2x + 1 and y = x - 2 a) (-1, -1) b) (-1, 1) c) (0, 2) d) (1, -1)

D

Step-by-step explanation:

y=-2x+1(1)

y=x-2(2)

sub;eq(2)in eq(1)

x-2=-2x+1

x+2x-2-1=0

3x-3=0

3x=3

x=1

sub; x=1 in eq(2)

y=x-2

y=1-2

y=-1

solution set is (1,-1)

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)

step-by-step explanation: