Answer:
infinitely many solutions
Step-by-step explanation:
Let's first eliminate y^2.
To accomplish this, divide the 2nd equation by 5, obtaining
y^2 = 5/2 - x^2. Now substitute this result for y in the first equation:
(-1/3)x^2 = -5/6 + (1/3)(5/2 - x^2), or
-x^2 -5 5 x^2
-------- = ------ + ------- - -------- and this simplifies to:
3 6 6 3
-x^2 x^2
------- = - ------- which is an identity and is thus always true.
3 3
Thus, any value of x will satisfy this equation; there are infinitely many solutions.
Step-by-step explanation:
A (the first one)
.............
Answer:
160 - 2
120 - 1 1/2
240 - 3
Step-by-step explanation:
80 km driven every hour
True, parallelogram needs to be parallel on each side
Given:
The shape of all building blocks is a cube of side 4 cm.
To find:
The volume of six building blocks.
Solution:
Volume of a cube is:
Where, a is the side length of the cube.
Putting , we get
It means the volume of each building block is 64 cubic cm.
Now, the volume of six building blocks is
Therefore, the volume of six building blocks is 384 cubic cm.