In 2012 five US postal stamps cost $2.20 how much did 7 stamps cost
2 answers:
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Step-by-step explanation:
First solve for y,
7-y<2x
7-2x<y
y>-2x+7
your y intercept would be (0,7)
and your slope would be -2/1 so, you go down 2 and 1 to the right.
Since this is a greater than symbol, we have to shade above the line and the line would also be a dotted line.
Now, recalling that for 1 yard, there are 3 feet, therefore 
and keeping in mind that, there are 4840 yd² in 1 acre, then
and keeping in mind that, there are 4840 yd² in 1 acre, then