The answer is 145. it was very counfusing at first
Answer:
son age: X
man_age= 5X
in 3 years: we have: (man_age+3)(X+3)=380
we can replace the man age by 5X and we get :
(5X+3)(X+3)=380
it is a quadratic equation with 2 solutions. One negative and 7
The solution is thus 7, since age can not be negative.
The son is thus 7 and the dad 5 times more 35
Step-by-step explanation:
I am not sure but I think it's b. Hope this helps
1 - C) 80 beats / min
2 - 1269/3 = 423 mph [ Option D ]
3 - Bag A
4 - 40 * 8 = 320 [ Option C ]
5 - 28 * 15 = 420 [ Option D ]
Hope this helps!
