. For each of the following binary relations r on N, decide which of the given ordered pairs belong to r. a. x r y 4 x + y < 7; (1, 3), (2, 5), (3, 3), (4, 4) b. x r y 4 x = y + 2; (0, 2), (4, 2), (6, 3), (5, 3)

answer: was that a question or answer?

step-by-step explanation:

only 10/60 isn't equivalent

hope this : )

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet