Answer:
They are all true
Step-by-step explanation:
1. 3² +4² = 5²
3x3 + 4x4 = 5x5
9 + 16 = 25
25 = 25
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2. 6² + 8² = 10²
36 + 64 = 100
100 = 100
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3. 9² + 12² = 15²
81 + 144 = 225
225 = 225
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4. 5² +12² =13²
25 + 144 = 169
169 =169
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The name of the shape is an octagon. Since there are 9 identical tiles and you have 72 sides, you would divide 72 by 9 and get 8. And shape that has 8 sides would be an octagon.
80,000,000,000/3.2569 = 24,563,234,978

Explanation
Step 1
find the slope
when yo know 2 points of a lines, P1 and P2, you can find the slope by using:

then, let
P1(6,0)
P2(0,4)
replace

Step 2
find the equation of the line,

so , the equation of the lines is

where -2/3 is the slope, and 4 is the y-intercept
I hope this helps you