There are two triangles here: ABC and ADF. These triangles are similar, and thus proportional. So, we can set up a proportion between the left side of each triangle and the base of each triangle.
AB / AD = BC / DE
4 / (4 + BD) = 5 / 9
---AD is made up of AB and DB. We know AB, but not BD, so we need to find its value to find the length of AD.
5(4 + BD) = 9 x 4
20 + 5BD = 36
5BD = 16
BD = 3.2
AD = AB + BD
AD = 4 + 3.2
AD = 7.2
Hope this helps!
The answer is 48. This is because the opposite side which is 64 is just 32+32
Meaning k is 24+24
Assignment: 
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Answer: 
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Explanation: 
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[ Step One ] Switch Sides
[ Step Two ] Expand 
[ Step Three ] Rewrite Equation
[ Step Four ] Add 8 To Both Sides
[ Step Five ] Simplify
[ Step Six ] Divide Both Sides By -1
[ Step Seven ] Simplify
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I would think the best deal is 5 pizzas for $19.00
A linear equation would be the best fit, but the last point (-1,-7) kinda messes it up. If the -7 would have been a -6 the line y=-2x-8 would fit perfectly.
