34 is the answer to this question
An obtuse triangle must have an angle greater than 90degrees (cannot equal 90). Therefore, A. would be the correct answer. This is because A. is the only set of angles that includes an angle greater than 90. Also, all angle measures add up to equal 180degrees.
<span>if the number is X, then 70 % of the number X has a value of 21.
then we can write it as an equation as follows
X * 70 % = 21
since 70% is equivalent to 0.7
X * 0.7 = 21
X = 21 / 0.7
X = 30
therefore number is 30</span>
