Differentiate with respect to x and y
2x +10 y y' = 0
get y' alone
y' = -2x/(10 y)
reduce
y'=-x/(5y)
continue with quotient rule of differentiation
y'' = ( 5y(-1) - (-x) (5y')) / (5y) squared
y'' = (-5y + 5xy') / (25y squared)
reduce by dividing each term by 5
y" = (-y +xy') / (5y squared) answer
Now if the teacher wants you to continue so no y or y' shows
substitute y' = -x/(5y) and y = square root ((5-x squared) / 5)
and simplify
Answer: m∠X + m∠Y < 90°
Step-by-step explanation:
We know that any triangle's angles add up to 180. But if one of those angles measures is greater than the two other angles, it is greater than 90. That would also mean those other angles are less than 90. So m∠X + m∠Y < 90°. Hope this helps, please consider Brainliest (click on the crown).