exam Maths Puzzle Numerical Ability

2. Evaluate each expression if x = 4
A. 9-2x+3
B. -30 / 6 + x . -5
C. 9x / ( 9-18) - ( -10)
D. - ( 5-17) /3 + -16 ( 1 over x)

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exam Other Question

How do I graph the inequality 3x-4y<12 PLEASE HELP !!!!!
In using mathematical induction to prove 1^2+3^2+5^2=...+(2n-1)^2 =
(n(2n-1)(2n+1)/3), the P k statment is 1^2+3^2+5^2+...+(2k-1)^2 = (k(2k-1)(2k+1)/3)
Is this true or false
THANK YOU