Answer: 
Step-by-step explanation:
Equilateral triangle has equal sides, let the side be
, then the perimeter is 
Therefore:



To find the altitude , we will apply Pythagoras theorem , that is

Therefore:



take the square root of both sides

T^2 = A^3
T^2 = 2^3
T^2 = 8
Time = sq root (8)
Time =
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2.8284271247
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So,
5y*3 is the open phrase the student uses to model "the sum of 5y and 3".
"The sum of" means addition. The student put 5y*3, while the sum of 5y and 3 is actually 5y + 3.
A) 3/7 and B) 25%. Give me a like if I helped please :)