Calcula el cateto (a) de un triángulo rectángulo cuando la
hipotenusa mide 66 cm y el
cateto (b) mide 15 cm.

1) is right

step-by-step explanation:

the first option is the answer.

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.

step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6