Answer:
13.858
Step-by-step explanation:
The steps are listed in the graphic.
Answer:
20
Step-by-step explanation:
40 - 15 = 25
25/1.25=20
The unit form for that is
5,500
Answer:
Step-by-step explanation:
discriminant=5²-4×1×7=25-28=-3<0
no real number solution.
Answer:
12 years younger.
Step-by-step explanation:
Let Jan's age be J and Karyn's age be K.

Jan's age 8 years ago is 2/5 of Karyn's age 4 yeaRs from now.

=> 
=> 4K = 48 X 3
=> K= 36.
=> J= 24.
So Jan is 12 years younger.