Hummingbirds beat their wings many times per second. Which equation relates the number of wing beats per second (a) to the number of wing beats per minute (b) ?
b = a + 60
b = 30
a = wing beats per second
b = wing beats per minute
b = 60a
Done

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.