It's an isosceles triangle 45° - 45° - 90°, therefore y = 5.
In that triangle, sides are in proportion 1 : 1 : √2.
Therefore we have x = 5√2.
<h3>Answer: B. x = 5√2, y = 5</h3>
Other method.
You can use the Pythagorean theorem:
x² = 5² + 5²
x² = 25 + 25
x² = 2 · 25
x = √(25 · 2)
x = √25 · √2
x = 5√2
<h3>Answer: B. x = 5√2, y = 5</h3>
I believe 156 because each person would have had to make 12 phone calls and there are 13 people so 12x13
12-5x+6x=412-5x+6x=4 the answer is going to be
x=-12
12-5(-12)+6(-12)=412-5(-12)+6(-12)=4
