Why did most ancient cultures primarily write out their mathematical texts in words?

Answer this question! 30 points and brainliest! only if you know the answer.

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me