A local clothing store sells t-shirts for $8 each, sweaters for $12 each, jeans for $15 each. Let x represent the number of t-shirts sold, y represents the number of sweaters sold, and z represent the number of jeans sold. Write an expression to represent the total amount of sales from t-shirts, sweaters, and jeans

8x + 12y + 15z

Step-by-step explanation:

Given the sales rate of three items: 8$ for t-shirts, 12$ for sweaters, and 15$ for jeans. It also states that these rates are represented by the corresponding variables being x for t-shirts, y for sweaters, and z for jeans.

To complete the expression, just combine the rate with the corresponding variables. i.e 8$ for t-shirts, and x for shirts = 8x, 12$ for sweaters and y for sweaters = 12y, 15$ for jeans, and z for jeans = 15z. Finally, sum them together.

8x + 12y + 15z

1.875

Step-by-step explanation:

To find the average rate of change, we will draw a line from the initial point (1850) to the final point (2010, 300B) as shown in the image provided

Now, we just have to find the slope of this line

We know that slope = Rise /Run

from the image, we know that the rise = 300 and the run is 160

Hence,

Slope = 300 / 160

Slope = 1.875

Therefore,

The average rate of change of cigarette consumption is 1.875 Billion