# Math Help - Pre-Algebra

1. ## Pre-Algebra

1. If Lynn can type a page in p minutes, what piece of the page can she do in 5 minutes?
A. 5/p  B. p - 5  C. p + 5  D. p/5  E. 1- p + 5

2. If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?
A. 2 hours and 24 minutes  B. 3 hours and 12 minutes  C. 3 hours and 44 minutes  D. 4 hours and 10 minutes  E. 4 hours and 33 minutes

3. Employees of a discount appliance store receive an additional 20% off of the lowest price on an item. If an employee purchases a dishwasher during a 15% off sale, how much will he pay if the dishwasher originally cost $450? A.$280.90  B. $287 C.$292.50  D. $306 E.$333.89

2. 1A
2A (Sally 1 hour: $\frac 14$ house; John 1 hour: $\frac 16$ house therefore Sally+John 1 hour $\frac 14+\frac 16=\frac 5{12}$ house so they can paint 1 house in $\frac {12}5$ hour which is A)
3D ( $450\cdot 0.85\cdot 0.8$)