Provide an appropriate response.The price of an item is reduced by 20% in a sale. Two weeks later the price is increased to 20% more than the sale price. Do you think that the item has been restored to its original price? If not, do you think its price is now higher or lower than the original price? Explain your thinking.
What will be an ideal response?
Answers will vary. Possible answer: The item has not been restored to its original price. Its price is now lower than the original price. The amount of the increase was less than the amount of the discount because 20% of the sale price is a smaller amount than 20% of the original price.
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A. x = -4 B. x = 5 C. x = -5 D. x = 4
Multiply.4x(-4x + 9)
A. -4x2 + 36x B. -16x2 + 36x C. 20x2 D. -16x2 + 9x
Solve the problem.Regrind, Inc. regrinds used typewriter platens. The cost per platen is 
The cost to regrind 110 platens is 
Find the linear cost function to regrind platens. If reground platens sell for 
each, how many must be reground and sold to break even?
A. C(x) = 1.60x + 400 break-even = 41 B. C(x) = 1.60x + 224 break-even = 33 C. C(x) = 1.60x + 224 break-even = 230 D. C(x) = 1.60x + 400 break-even = 60
Solve the problem.A child's coin bank contains $1.51 in pennies and nickels. If the number of pennies is 47 less than 4 times the number of nickels, how many pennies are in the bank?
A. 22 pennies B. 41 pennies C. 4 pennies D. 31 pennies