Answer:
The solution is x=1,y=2,z=3
Step-by-step explanation:
The given system of equations is ;\
2x−3y+4z=8...(1)
3x+4y−5z=−4...(2)
4x−5y+6z=12...(3)
Make x the subject in equation (1)

Put equation (4) into equation (2) and (3)

Multiply through by;

Expand;

Simplify;

Equation (4) in (3)





Put equation (6) into equation (5)




z=3
Put z=3 into equation (6)
y=2(3)-4=2
Put y=2 and z=3 into equation 4

The solution is x=1,y=2,z=3
So, hmmm keeping in mind that, an absolute value expression is in effect a piece-wise function, let's find its "slopes", the negarive slope on the left-side and the positive slope on the right side, and let's use the vertex point as our first point
what is the slope of a line that passes through (2, -1) and (0,7)

now, what is the slope of a line that passes through (2, -1) and (4,7)

since an absolute value expression is just a piece-wise with a +/- versions, then we can just combine those two.
Answer:
C
Step-by-step explanation:
4(3x+5) = 12x+20
101.15
Explanation:
140 x 7.25% = 10.15
140 x 35% = 49
Then we add the tax and subtract the sale :
140 + 10.15 - 49 = 101.15$
Hope it’s right
Best luck with your studying