T = total cost for music school
L = # of lessons
T = $1,190 + ($40 × L)
T = $1,190 + ($40 × 12)
T. = $1,190 + $480
T = $ 1,670 for 12 lessons
With base-ten blocks ,there would be the 3 units, 1 tens block , and five hundreds cubes
You just multiply the 2 numbers!
