x = 2 & y = 3
.............................
A multiplication is zero if and only if at least one of the factors is zero. So, in this case, the multipications equals zero when

The first equation has no real solutions, because
is a square, and thus it's positive. If you add 4 to a positive number, the result can't be zero.
The second equation has the solution

So, globally, the expression equals zero if and only if 
Answer:
1
Step-by-step explanation:
1/2+1/2=1
0.5+0.5=1
There!
Answer:
The equations y=10x+250 and y=20x represent the situation.
Step-by-step explanation:
Given that:
Cost to rent the park = $250
Cost per person for t-shirt and snack = $10
Cost of participation = $20
y = cost
x = number of people
Cost for the organization;
y = 10x + 250
Amount generated from people's participation
y = 20x
Hence,
The equations y=10x+250 and y=20x represent the situation.