How is the total price including sales tax calculated?
a. (purchase price) x (percent sales tax); then added to the original amount
b. (purchase price) x (percent sales tax); then subtracted from the original amount
c. (purchase price) x (percent sales tax); then divided by the original amount
d. (purchase price) x (percent sales tax); then multiplied by the original amount

a is correct

(purchase price) x (percent sales tax); then added to the original amount

Step-by-step explanation:

When we buy some product. We have to pay tax on their purchasing amount. Tax always calculate as percentage.

First we find percentage of sales tax on purchase price which called sale tax value

Now we add sale tax amount into purchase value to get final payment of product.

Let original or purchase price of any product be p and sale tax on that product is s%

Sale tax value = s% of p = ps/100

Final price to pay = p + ps/100

Hence,  (purchase price) x (percent sales tax); then added to the original amount

here's what i find.

step-by-step explanation:

part a. set up the inequality

let x = the temperature on the field.

you have two conditions

(1) x > -40

(2) x < 118

reverse equation (1)

(3) -40 < x

combine equations (3) and (2)

-40 < x < 118

part b. graph the inequality

i graphed the inequality on the number line below.

the red shaded area between -40 °f and 118 °f represents the temperatures in which the pilot can fly.

the open circles show that -40 °f and 118 °f are not included in the data set because the pilot cannot fly at those temperatures,

part c. x = 122 °f

122 °f is to the right of 118 °f. it is on the black portion of the number line and not in the acceptable red zone.

the pilot could not have taken off on this day, because hotter air is less dense than cooler air. the plane's wings cannot generate enough lift to get off the ground.