exam Maths Puzzle Numerical Ability

Solve for R1:

1/F = (n-1)(1/R1-1/R2)

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exam Other Question

Solve each inequality.Graph the soultions.

7+x(is greater than equal to sign)9
Adult tickets for a play cost $11 and child tickets cost $10. If there were 23 people at a performance and the theater collected $246 from ticket sales, how many children attended the play?

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