If line l in the xy-coordinate plane has a positive slope, what is the x-intercept of l ? (1) there are different points (a, b) and (c, d) on line l such that ad = bc. (2) there are constants m and n such that the points (m, n) and (–m, –n) are both on line l.

The x-intercept of L is 0

Step-by-step explanation:

1)  If (a,b) and (c,d) belongs to theline L, then the equation of the line using two-points formula  will be:

if we want to find the x-intercept of L we should set y=0.

getting x from that equation we will have :

using distributive propertie and common denominator will be obtain

x=

as we know that ad=bc the numerator will be equal to zero. Then x=0.

2) Using the same equation of line but using the points(m,n) and (-m, -n) we will set it as:

if we want to find the x-intercept of L we should set y=0.

getting x from that equation we will have :

them

x = 0

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)