The selling price of an item is $455. It is marked down by 20%, but this sale price is still marked up from the cost of $280. Find the markup from cost to sale price. The markup is $
nothing. (Round to the nearest dollar as needed.)

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?

Write as a product of two polynomials. 2(3–b)+5(b–3)^2