Answer:
The student added the same thing instead of the opposite to each side
Add .72 to each side to make -.72 become 0 on the left -2.5 to become -1.78 on the right
Step-by-step explanation:
z + (-0.72) = -2.5
Add . 72 to each side
z + (-0.72) + .72 = -2.5 +.72
z = -1.78
Answer:
15(3y+1)
Step-by-step explanation:
Brainliest PLEASE
Hey there!
When solving systems of equations by elimination, what we do is we remove one variable by combining the equations and then we solve for one variable.
How does this work?
Well, let's say we have 2x in one equation and 2x in the other equation. If we combine the equations, it will simply be 4x! What we need to do is multiply one of the equations by -1, which will make one of the 2x's and -2x. Then, if we combine the two equations, our x's will be cancelled out and we can solve for y.
In our case, we don't have to manipulate any of the equations because we already have 3x in one equation and -3x in another, so we will just add the two equations.
3x-y=0
+
-3x+5y=0
=
4y=0
y=0
Now we plug this into one of the original equations to find x.
3x-0=0
3x=0
x=0
Therefore, our solution is x=0 and y=0 (0,0).
I hope this helps!
So first you have to find how many 85's are in 68000 because it says "for every 85" 68000 divided by 85 = 800 and it also says one 40 dollar product
for each so 800 x 40 = (figure out 800 x 40)
Hope this helped as well as it being correct!
Find the range of these numbers:<br>
15,2,3,7,8,4,3,2,16,2,4
Anestetic [448]
2 2 2 3 3 4 4 7 8 15 16
16-2=14
the range is 14