Statement: Your question is well elaborate and has all needed data.
Answer:
A 7,4.5
Step-by-step explanation:
Answer:
D but see below.
Step-by-step explanation:
It can be factored if you are allowed to use square roots.
(p + 5√5)(p - 5√5)
Usually, you are not allowed to do that. Usually you must be working with whole numbers or rational well behaved fractions.
I think, given the above comment, the answer is D
Let the present age of student be x
Present of teacher will be 4x
After 20 years,
Age of student = x + 20
Age of teacher = 4x + 20
According to the given condition after 20 years,
x + 20 = (4x + 20)/2
x + 20 = 2x + 10
2x - x = 20 - 10
x = 10
So student's present age is 10 years while teacher's is 4 x 10 i.e 40 years.
Hope This Helps You!
