Shari, who is not yet 21, is 2 years older than Lily. Represent in inequality form

Anumber cube is rolled and a coin is tossed. the number cube and the coin are fair. what is the probability that the number rolled is less than 4 and the coin toss is tails?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Evaluate the expression for the given value of the variable. | ? 4 b ? 8 | + ? ? ? 1 ? b 2 ? ? + 2 b 3 -4b-8+-1-b2+2b3 ; b = ? 2 b=-2