7choose a number b at random from the interval [0, 1] with uniform density. find the probability that (a) 1/3 < b < 2/3. (b) |b − 1/2| ≤ 1/4. (c) b < 1/4 or 1 − b < 1/4. (d) 3b2 < b

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.