What is the pythagorean theorem

a2 + c2 = b2
a2 – b2 = c2
2a + 2b = 2c
none of the above

A2+b2=c2  I hope this helps because I'm learning the Pythagorean Theorem

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post