Answer:
25
Step-by-step explanation:
2x+2+5x+3=180
7x=175
x=24
Answer:
The relationship is positive.
The model predicts a score of 60.
Not sure what part b is.
Step-by-step explanation:
Since while the money spent on advertising increases while the items sold increases, we have a positive relation between both variables.
By looking at where 30 is on the graph, we can see it lines up with 60,the middle between $40 and $80 on the y axis and so we know this is the cost associated with this value.
x = 6
given x varies inversely with y then
xy = k ← k is the constant of variation
to find k use the condition x = 4 when y = 9, hence
k = 4 × 9 = 36
x = 
← inverse variation equation
when y = 6, then x = 
= 6
Well for every ten packs Jason paid $16 ($64/4). If he charges his friend what he was charged, he would charge $16 for 10 packs :)
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