exam Maths Puzzle Numerical Ability

Solve each literal equation for the indicated variable.
A = 1/2h(B + b) (solve for b) Area of a trapezoid
This is the problem in word form, (A) equals one half (h) times (B + b), solve for (b)

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exam Other Question
The product of two consecutive odd integer is 1 less than 4 times their sum find the two integers The probability of being choosen for a dance committee is 3/40. There are 360 students in your class. How many people will be on the dance committee?

A. 9
B. 27
C. 40
D. 120