Which expression is equivalent to the given expression? 3(x-7)+4(x^2-2x+9)
2 answers:
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Answer: d. (17, 20)
Step-by-step explanation:
We have the following system of equations:
(1)
(2)
Isolating from (1):
(3)
Substituting (3) in (2):
(4)
Isolating :
(5)
(6)
(7)
Substituting (7) in (1):
(8)
Isolating :
(9)
Hence, the correct option is d. (17, 20)