aprAnnajessma aprAnnajessma

21-11-2016
Mathematics

Answered

Solve the system of equations below by graphing them with a pencil and paper. Choose the correct ordered pair (b, u).

u = -b + 21

u = -2b + 30 ...?

Verified Answer :

nobillionaireNobley nobillionaireNobley

23-11-2016

u = -b + 21 . . . (1)
u = -2b + 30 . . . (2)
Equating (1) and (2),
-b + 21 = -2b + 30
-b + 2b = 30 - 21
b = 9
u = -9 + 21 = 12

Therefore, (b, u) = (9, 12).

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