28) One number is four more than a second number. Two times the first number is

Question

28) One number is four more than a second number. Two times the first number is 2 more than 28) four times the second number. 29) Devon purchased tickets to an air show for 4 adults and 2 children. The total cost as $66. 29) The cost of a child's ticket was $3 less than the cost of an adult's ticket. Find the price of an adult's ticket and a child's ticket. 30) Jimmy is a partner in an Internet-based coffee supplier. The company offers gourmet30) coffee beans for $11 per pound and regular coffee beans for $7 per pound. Jimmy is creating a medium-price product that will sell for $9 per pound. The first thing to go into the mixing bin was 10 pounds of the gourmet beans. How many pounds of the less expensive regular beans should be added?

Explanation / Answer

28) let one number be X and second number be y

=> X=y+4 and 2x = 4y

Solving above equations ,we have y =4, X=8

29)let the price of an adult's ticket is X and the price of a child's ticket is y

=>4x +2y= 66 And y = X -3

=> X = 12 and y= 9

30) let the pound of regular beans which should be added be X

=> 11 X 10 + 7 y = 9( 10 + y)

=> 110 + 7y = 90 + 9y

=> 2y = 20

=> Y= 10

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