K(x) = 5x-6 (k+k)(x) = k(x) + k(x) = 5x-6 +5x-6 simply substitute x = 4,[ [TAG_3]](k+k)(4) = 5(4) -6 + 5(4) -6 that will be your answer, the last option.
Let Monique have m brushes. Chelsea then has <span>11m brushes because she has 11 times as many as Monique. Together they total 60 brushes, so we form the equation:
m+11m=60.
Thus 12m=60, and dividing both sides by 12 gives m=5.