Write an equation in slope intercept form using the given slope and y-intercept (problem 13)

13. y = -5x -2

Step-by-step explanation:

Use the slop intercept formula: y = mx + b

Point is (0,-2) and slope is m=-5, equation is y-y1=m(x-x1), plug and chug

13. m=-5 point is (0,-2)

y-y1=m(x-x1)

y-(-2)=-5(x-0)

y=-5x-2

16. m=12 point is (0,4/5)

y-y1=m(x-x1)

y-(4/5)=12(x-0)

y=12x+4/5

hope this helps

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)