A company buys a digital scanner for $12,000.  The value of the scanner is $12,000 (1 - n/5 ) after years. 
The
company has budgeted to replace the scanner when the trade-in value is $,400. 
After how many years should the
company plan to replace the machine in order to receive this trade-in value?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Hormones perform important functions within the reproductive system. during puberty, a number of changes occur in the body. which hormone is responsible for the development of these characteristics in the female? estrogen progestin progesterone testosterone

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?