Answer:
it's too blurryyyyyyyyyyyyyyyyyyyyy
The answer is <span>-1.2917960675</span>
Multiply the numerator and denominator by 7×2 = 14 to eliminate the denominators of those fractions:

Rationalize the denominator by multiplying both numerator and denominator by √10:

Lastly, cancel the common factor of 2 in both the numerator and denominator (which comes from 6 = 2×3 and 490 = 2×245):

If c is the hypotenuse and b is the leg, then the third side (a):

If b and с are legs, then hypotenuse (a):
R = {10; 15; 20}
S = {20; 25}
R U S = {10;15; 20; 25;