What line is perpendicular to y=x+9

y= –1/x

Step-by-step explanation:

Perpendicular = gradients are the inverse of each other or in other words, gradient 1×gradient 2 = –1

Examples of perpendicular gradients:

2 and –1/2

2/4 and -4/2

When inversing a number:

Change the sign (– to +/ + to –)

Swap the numerator with the denominator (1/2 becomes 2/1, or simply 2)

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)

she was supposed to add the hours(38.5) and multiply the amount of money she earned(7.50) resulting in $288.75 .

correct me if i'm wrong and if it is i'm truly sorry.