The sum of the present ages of the mother and her daughter is 80 years. The mother was thrice as old as her daughter when she was as old as her daughter is now, Find
the present ages of the mother and her daughter.​

20 and 60

Step-by-step explanation:

80= 3x + x

80= 4x

x=20

Daughters Age = x = 20

Mothers Age = 3x = 3(20)

=60

mother=60

daughter=20

Step-by-step explanation:

present age is 80

mother is thrice as old as her daughter when she was as old as her daughter is now

i.e 3x

then daughter is x

so 3x + x =80

4x =80

4x/4=80/4

then you cancel out with 4

therefore x is 20

mother=3x

3×20=60

then daughter=20

step-by-step explanation:

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.