Tammy sells necklaces for three dollars each she spent $14 on supplies the expression 3x -14 can be used to find the amount tammy earns for selling x necklaces how much will tammy earn if she sells 12 necklaces evaluate algebraically

Tammy will earn $22 after selling 12 necklace.

Step-by-step explanation:

Given:

Cost of each necklace = $3

Cost on supplies = $14

Let Number of necklace be

We need to find the amount of money Tammy will earn after selling 12 necklace.

Solution:

Now Given:

expression representing the amount Tammy earns for selling X necklaces=

To find the amount of money Tammy will earn after selling 12 necklace we will substitute the value of 'x' = 12

On Substituting we get;

Amount of money Tammy will earn =

Hence Tammy will earn $22 after selling 12 necklace.

Part A:

Given that 18% of the population is left handed, in a sample of 6 customers, we expect to see 0.18 x 6 = 1.08 lefties.

Part B:

Given that the proportion of lefties is 18% or 0.18 and the proportion of non-lefties is 100 - 18 = 82% or 0.82.

Since the sample size is 6, the sample standard deviation is given by: