Dewayne says that 60% more than 50 is 80.tationna says that 60% more than 50 is 30.who is right? what mistake did the other person make?

Dewayne is right.  

Step-by-step explanation:

Dewayne:

.60 *50 + 50 = 80

30 + 50 = 80

80 = 80

correct

Tationna

.60 * 50 = 30

She found 60 percent  of 50

not 60 percent more

more means add

Step-by-step explanation:

The culprit here is the word more. More means that the number they finally get must be larger than 50. So Tationna is incorrect. She  made the mistake of thinking that the 60% represented multiplication. She was taking 60% of 50. She was not taking 60% more.

DeWayne has the right answer.

60% of 50 = 60/100 * 50 = 30 as Tationna said.

But that must be added onto 50

50 + 30 = 80

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

step-by-step explanation:

two pairs of adjacent sides are of equal length. this implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. it also implies that the diagonals are perpendicular.