How can 17/20 and 7/4 make a sum of 9/10

the answer is

Step-by-step explanation:

You have to find the common denominator in order to get the sum.

multiply 5 to and you get

then to double check the sum, subtract it.

hope this make sense :/

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step-by-step explanation:

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