5x+4=9 its an expression which is greater than 1 you can do almost any expression but it has to be more than one.
Hope this helps :D
Answer:
slope = 1/7
Step-by-step explanation:
7x+y=9 you should be in slope int form--> y=-7x+9
then the line is perpendicular so
the slope is 1/7
Answer:
<h3>

</h3>
Step-by-step explanation:

Move 7 to right hand side and change it's sign
⇒
Add the numbers
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Divide both sides of the equation by 0.5
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Calculate
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Hope I helped!
Best regards!!
The selling price is <u>$29.40</u>
<h3>
EXPLANATION</h3>
10% of $21 = $2.10
$2.10 x 4 = $8.40 = 40%
$21 + $8.40 = <u>$29.40</u>
Hope this helps!
2. (-1,4) because it’s the only point in the intersection of both intersections. All the other points only fall into the solution of one inequality or in the case of 4 none