An IT storekeeper ordered x mp4 players for a total cost of €840. He sold them at €20 each more than they had cost him. Five of the mp4 players were damaged and could not be sold. If he made a profit of €90 on the whole transaction, form an equation in terms of x and solve it to find how many mp4 players the IT storekeeper ordered.
An IT storekeeper ordered x mp4 players for a total cost of €840. He sold them at €20 each more than they had cost him. Five of the mp4 players were damaged and could not be sold. If he made a profit of €90 on the whole transaction, form an equation in terms of x and solve it to find how many mp4 players the IT storekeeper ordered.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter5: Linear Inequalities
Section5.1: Solving Inequalities By Addition And Subtraction
Problem 57PFA
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Transcribed Image Text:12. An IT storekeeper ordered x mp4 players for a total cost of €840. He sold them at €20 each
more than they had cost him. Five of the mp4 players were damaged and could not be sold.
If he made a profit of €90 on the whole transaction, form an equation in terms of x and solve
it to find how many mp4 players the IT storekeeper ordered.
13. A man completed an expedition of 400km at a uniform speed. If the speed had been
increased by 2kmh", the time for the journey would have been decreased by 10hours.
Calculate the speed at which the man travelled originally.
14. A cyclist decides to ride for a distance of 8km from Mellieħa to Buġibba at an average
speed of xkmh. On his return journey from Mellieħa to Buġibba he rides 14kmh faster
and completes the journey 28 minutes quicker. Form and solve an equation in x.
15. A canoeist makes a journey along a river 60km long and back again. The canoeist can row
at a speed of 8kmh and the river stream has a speed of xkmh'. If it takes 16 hours for the
canoeist to go upstream and back again, find the speed of the stream.
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