Answer:
5) a)(-4,-6) b) (4,2) c) (2,6) 6) (3,2)
Step-by-step explanation:
5) the solution is the points where the lines meet.
6) graphed the lines; the picture of the graph is attached below
Answer:
z = 
Step-by-step explanation:
Given z is directly proportional to x and inversely proportional to y then the equation relating them is
z =
← k is the constant of proportionality
To find k use the condition x = 7, y = 7 and z = 2
k =
=
= 2
z =
← equation of proportionality
When x = 10 and y = 12, then
z =
=
= 
Answer:
7 in
Step-by-step explanation:
Process of elimination. It can’t be 9 or 10, because 9+9=18 and 10+10=20 (they're more than 16). 8+8=16 exactly, but there’s no room in 16 for the width. Therefore, it’s 7 because 7+7=14