Answer:
In the picture.
Step-by-step explanation:
I solved only these problems ( 85 to 90 )
I don't know about the last four problems.
Sorry for that, but I'm trying to help you :)
Distribute the 5
25t-10=-35
+10 +10
25t =-25
divide by 25 on both sides
t=-1
The unknowns in this problem are A. The number of boys and the number of girls in the class.
We know there are 7 more girls than boys, but because we don't know how many boys there are, we don't know how many girls there are.
(0, 0) <span>P = <span> ⇒ 0</span></span>
(0, 15) <span>P = <span> ⇒ 1200</span></span>
(6, 12) <span>P = <span> ⇒ 1260</span></span>
Answer:
weeks
Step-by-step explanation:
Given
It takes 14 weeks to empty a lake
also it takes 20 weeks for a river to fill the lake
Part of lake empty in 1 week 
Part of lake filled in 1 week is 
And if both works simultaneously then


therefore it takes
weeks to fill it