Here's the solution,
The given triangle is an <u>equilateral triangle</u>, because it's all angles measure 60° each
now,
Area of an equilateral triangle :
=》

where,
=》

=》

=》

or
=》

(2x-20)/3 = 2x start by multiplying both sides by 3
The answer is c 28 because it is going by plus 4 <span />
So, we need to count up 1/4 each time till we get to 3.
1/4, 2/4, 3/4, 1, 1 1/4, 1 2/4, 1 3/4, 2, 2 1/4, 2 2/4, 2 3/4, 3.
Now, let's count how many times we counted to get to 3.
12.
So, Jill used 12 bottles of lotion.
Glad I could help, and good luck!
AnonymousGiantsFan
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