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Maths Puzzle
Numerical Ability
the 12th term of an arithmatic series is 42 and the sum of the first 17 terms is 51. find the common difference of the series and the first three terms.
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can you please help me with my problem. its about System of Linear Equations in three variables,
A Dependent system of three equations:
2x - 3y - z = 4 (1)
-6x + 9y + 3z = -12 (2)
4x - 6y - 2z = 8 (3)
please help..
The area of a gymnasium floor is 264 square yards. The floor is 11 yards wide. How long is the floor?
a)253 yards
b)24 yards
c)11 yards
d) 242 yards