12f – 3(2f + 2)
A. 8f + 6
B. 18f – 6
C. -10f + 6
D. -18f – 6

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x