Which number is the closest approximation to the value of √13 +√21

Daniel bought a computer game for $25 and later sold it to thomas for a 40% profit. how much did daniel sell the computer game for?

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

Proving the parallelogram diagonal theoremgiven abcd is a parralelogam, diagnals ac and bd intersect at eprove ae is conruent to ce and be is congruent to de