2x - 3y - 9z = -32
x + 3z = 8
-3x + y - 4z = -8
Add all the equations together.
-3y - 10z = -32
By looking at the first equation, 2x - 3y - 9z = -3y - 10z.
So 2x = -z.
By looking at the second equation, x + 3z = (-0.5z) + 3z = 8.
So 2.5z = 8, and z = 3.2.
This means that x = -1.6.
Let's substitute into our original equations!
-3.2 - 3y - 28.8 = -32
4.8 + y - 12.8 = -8
Therefore, y = 0!
Since these answers do not contradict each other, they are dependent.
The answers are x = -1.6, y = 0, z = 3.2.
Answer:
Ambitious Ambitios Ambitious Ambitios
An acute angle is less than 90°, so for example you can choose angles A-F-B, C-F-D or E-F-D.
An obtuse angle is more than 90, so we can choose angle A-F-C for example: is it the sum of A-F-B (acute) and B-F-C (right), so the result is surely more than 90.
A right angle is an angle of 90°, which is B-F-C, because it is labeled as such
A straight angle is an angle of 180°, and AFE seems to be so, because A-F and F-E are two rays starting from the same point (F), and going opposite directions.
Answer:
There are 8 girls.
Step-by-step explanation:
Answer:
$34.40
Step-by-step explanation:
26.46 ×30% = 7.94
26.46+7.94= 34.4
