In all honesty I don’t know but it’s between 110 and 116
Answer:
<em>let</em><em> </em><em>the</em><em> </em><em>cost</em><em> </em><em>price</em><em> </em><em>=</em><em> </em><em>5</em><em>x</em>
<em>let</em><em> </em><em>the</em><em> </em><em>selling</em><em> </em><em>price</em><em> </em><em>=</em><em> </em><em>7</em><em>x</em>
<em>profit</em><em> </em><em>=</em><em> </em><em>selling</em><em> </em><em>price</em><em> </em><em>-</em><em> </em><em>cost</em><em> </em><em>price</em>
<em>=</em><em> </em><em>7</em><em>x</em><em> </em><em>-</em><em> </em><em>5</em><em>x</em><em> </em>
<em>=</em><em> </em><em>2</em><em>x</em>
<em>profit</em><em> </em><em>percentage</em><em> </em><em>=</em><em> </em><em>2</em><em>x</em><em>/</em><em>5</em><em>x</em><em> </em><em>×</em><em> </em><em>1</em><em>0</em><em>0</em>
<em>=</em><em> </em><em>2</em><em>×</em><em>2</em><em>0</em>
<em>=</em><em> </em><em>4</em><em>0</em><em> </em><em>percent</em>
1. Given (12+3)x, we can sum the numbers in the parenthesis to get 15x
2. Given 12x+3x, we can factor x to get (12+3)x and get the same as 1.
3. Given (12+3x)x, we have to distribute the x and we have 
4. This expression is already simplified.
Take the totally needed to buy it, put the amount you have and then add but substitute for a variable the amount needed.
Answer: The first one is "translated 4 units down". The second one is "vertically stretched by a factor of 4".
Recall that y = f(x). When we say f(x)-4, we really mean y-4 so that means each y coordinate of all the points on the graph have been reduced by 4. Visually this shifts the graph down 4 units. A translation in geometry is the technical term for shifting.
When we say 4*f(x), we are multiplying each y coordinate by 4. A point like (1,2) turns into (1,8) for instance. If you apply this to every point on the graph, then the curve is stretched vertically to be 4 times taller than it usually is; which is an informal way of saying "vertically stretched by a factor of 4"
