A jar currently contains 9 quarters, 5 dimes, 4 nickels, and 2 pennies. If she selects a coin at random, what is the probability the coin has a value less than a quarter?

-18

step-by-step explanation:

because mean value defines that total sum value over total number of set

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.