Mary is 3 years older than twice her brother's age, a. Which expression represents Mary's age?
A. 2a + 3

B. 2a - 3
C. 3a + 2

D. 3a - 2

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

If sin θ=24/25 and 0 less than or equal to θ less than or equal to π/2, find the exact value of tan 2θ. answers; a) -527/336 b) -336/527 c)7/24 d) 24/7

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.