book Maths Puzzle Numerical Ability

. Solve the following system by addition. If a unique solution does not exist, state
whether the system is inconsistent or dependent.
x + 5y = 10
-2x - 10y = -20

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Hi. I need help with the following problem please:

Which of the following polynomial functions might have this graph?

y = x^3(x - 1)^2(x - 2)
y = 2x^3(x - 1)(x - 2)^2
y = 5 i need help!

1) Use the arithmetic sequence of numbers 1, 3, 5, 7, 9,�to find the following:
a) What is d, the difference between any 2 terms?
Answer:
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