Answer:
C. They have two pairs of parallel
Step-by-step explanation:
The y variable in both equations are opposites. So, we can add the two systems together to eliminate y and solve for x.
-4x + y = -10
6x - y = 16
2x = 6
2 × 3 = 6.
x = 3. Now we have to solve for y. Let's use 6x - y = 16.
6(3) - y = 16
18 - y = 16
18 - 2 = 16, so y = 2.
x = 3
y = 2.
Or if you have to put it in coordinate form: (3, 2)
This is a parabola which has vertex at the origin and opens upwards.
general form is x^2 = 4ay where a is the focus
the focus is the same distance from the vertex as the directrix So it is at the point (0, 6)
required equation is x^2 = 4*6 y
or y = (1/24) x^2
Ok, so the bigger box has sides that are multiples of 4.5 inches:
18in * 9in * 4.5in.
in terms of the cubes that go inside them, the bigger box is:
4 box * 2 box * 1 box, so you know that 8 boxes fit inside.
