How much would a $3500 piano cost if it was on sale for 20% off with the 6% sales tax on the
1 answer:
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Answer:
Option B
The solution in the attached figure
Step-by-step explanation:
we have
<em>Inequality A</em>
we know that
The solution of the inequality A is the shaded area above the dashed line
The equation of the dashed line is
The slope of the dashed line is negative
<em>Inequality B</em>
we know that
The solution of the inequality B is the shaded area above the dashed line
The equation of the dashed line is
The slope of the dashed line is positive
therefore
The solution in the attached figure
You are solving the two equations for x.
9.
r = 4 + 7x - sx
We need to solve for x. x is only found in the right side. First, just flip the sides to find x only in the left side.
4 + 7x - sx = r
We want all terms with x on the left side, and all terms without x on the right side. Now we subtract 4 from both sides.
7x - sx = r - 4
Factor x in left side.
x(7 - s) = r - 4
Divide both sides by 7 - s.
12.
3z + 8 = 12 + 3x - z
Since x is only in the right side, flip the sides.
12 + 3x - z = 3z + 8
We need to isolate x in the left side, so subtract 12 from both sides and add z to both sides.
3x = 3z + 8 - 12 + z
3x = 4z - 4
Divide both sides by 3.