Alicia went to the store to buy folders each folder cost $0.15 .she bought 12.how much money did she spend on the folders show & label

$1.8

Step-by-step explanation:

let x equal the money that she spend on the folders

let y equal the cost of 1 folder

let z equal the number of folders she bought

We got:

y + z = x

We know that :

y = 0.15

z = 12

So,

y * z = x

0.15 * 12 = x

1.8 = x

So x = 1.8

Alicia cost in total of $1.8 to buy folders

Hope this help you :3

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)

angle addition postulate

2x=56

step-by-step explanation: