For kids party of africa, it is also a way to get clean water to their communities. how? the merry-go-rounds pump water out of the ground. they are called playmup water systems.
people need clean water for drinking, cooking, cleaning, and bathing. many people around the world do not have clean water. in some parts of africa, women and girls have to walk miles to get clean water
people are raising money now for more playpump systems by 2010, they hope to have 4,000 play pumps in africa

from the sentence people hoped to have 4,000 playpumps in africa by 2010. can u tell me the answers ples
question 1: (did) what
question 2: when?
question 3: where?

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.