S= 70w + 750
s(19) = 70w x 19+350= 1680
so its 1680
Answer:
D 5x^2+2x-7
Step-by-step explanation:
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:
You need two // sides. Thus this figure doesnt show that
