Muujiunc utc allswers aduve is not cutel.(1 point) solve the system using the substitution or elimination method| 2x – 6y = 14,-3.x +9y = –21.how many solutions are there to this system? o a. noneob. exactly 1oc. exactly 2od. exactly 3o e. infinitely manyof. none of the aboveif there is one solution, give its coordinates in the answer spaces below. if there are infinitely many solutions, enter x in the answer blank for x and enter a formula for y in terms of r in the answer blank for y. if there are no solutions, leave the answer blanks for i and y empty.=xy=1note: in order to get credit for this problem all answers must be correct.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

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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