Answer:
True
Step-by-step explanation:
Subtracting a number is identical to adding its opposite.
-2 -5 = -2 +(-5)
The statement is True.
_____
If you doubt this, you can have your calculator tell you what the answers are.
3x+3y+6z=9
x+3y+2z=5
3x+12y+12z=18
Step 1: use Eq 2 to solve for x
x+3y+2z=5
x= -3y-2z+5
Step 2: Solve for y unsing Eq 1
3x+3y+6z=9
3y= -3x-6z+9
y= -x-2z+3
Step 3: plug in x= -3y-2z+5 to solve for the value of y
y=-x-2z+3
y= (-1)(-3y -2z +5) - 2z+3
y= 3y+2z-5- 2z+3
-2y= -2
y=1
Step 4: plug y= 1 into the x= equation
x= -3y-2z+5
x= -3(1)-2z+5
x= -2z+2
Step 5:Plug y= 1 and x= -2z+2 into the 3rd equation to solve for z
3x+12y+12z=18
12z= -3(-2z+2)-12(1)+ 18
12z= 6z - 6 - 12 +18
6z= -18+18
6z=0
z=0
Step 6: Plug z in to solve for x
x=-2z+2
x= (-2)(0)+2
x= 2
ANSWER:
x,y,z = 2,1,0
answer choice C
<span>circumference = 5 * PI = </span><span><span><span>15.7079632679
</span>
</span>
</span>
<span>arc length = circumference • [central angle (degrees) ÷ 360]
</span>arc length = <span><span>15.7079632679
</span>
* 60 /360
</span>arc length =
<span>
<span>
<span>
2.617993878
</span>
</span>
</span>
It should be for 5 hours if $30 is what they started with
Answer:
y = 25
Step-by-step explanation:
![30=\frac{6}{5} y\\\\\frac{6}{5} y=30\\\\(\frac{6}{5} y)5=30*5\\\\6y=150\\\\\frac{6y=150}{6}\\\\\boxed{y=25}](https://tex.z-dn.net/?f=30%3D%5Cfrac%7B6%7D%7B5%7D%20y%5C%5C%5C%5C%5Cfrac%7B6%7D%7B5%7D%20y%3D30%5C%5C%5C%5C%28%5Cfrac%7B6%7D%7B5%7D%20y%295%3D30%2A5%5C%5C%5C%5C6y%3D150%5C%5C%5C%5C%5Cfrac%7B6y%3D150%7D%7B6%7D%5C%5C%5C%5C%5Cboxed%7By%3D25%7D)
Hope this helps!