Answer:
If a polygon has four sides then it is a quadrilateral
Let
x--------> the number of blue beads
y--------> the number of red beads
we know that

-------> equation 
------> equation 
equate equation
and equation 

find the value of x

therefore
the answer is
Ivan has

For the numeric part, you'll have to find the GCD of 15 and 25, which is 5. So, we can factor a 5 and we have

As for the literal part, you can factor
because it's the power of s with the smallest denominator. So, we have

Answer:
12 units
Step-by-step explanation:
- chords
and
are equidistant (7.2 units) from the center of the circle O. - Measures of the chords equidistant from the center of the circle are equal.

