A store gives a customer 20% off if $10 or more amount of product is purchased. Otherwise the customer pays the usual price at checkout. The amount of product a customer purchases is modeled by a continuous random variable X with density

The expected payment by the customer at the checkout is $9.

Step-by-step explanation:

The amount of the product is given as

Now the expected payment is given as

Here 0.8 x is used in the second integral because of the discount of 20% i.e. the expected price is 80% of the value such that

The expected payment by the customer at the checkout is $9.

y-1700=200(x+4)

step-by-step explanation:

200(x+4) is 200x + 800 she is saving 200 per week x is the weeks and the -1700 is. us that’s howmuch she already had

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3