Question

GED Math Practice
A triangle is to be changed by increasing the length of its base by 40% and decreasing the length of its height by 40%. Which of the following must be true about the area of the triangle?
It will increase by 40%.
It will increase by 16%.
It will not change.
It will decrease by 16%.
It will decrease by 40%. @secret66 please help

Answer 1

@perl can you help me understand ?

Answer 2

will give medal

Answer 3

ok do you agree x is length, y is height

Answer 4

x is length of its base

Answer 5

yes

Answer 6

so a 16% decrease

Answer 7

Refer to the attachment, caclulated with the use of Mathematica 9.