Winona and Takoda are shopping for a present for their mother.
The chart shows several possible presents. There is no sales tax in the state where they live.
Present Cost ($) Discount (%) Total Paid
Power tools d 15% (+2)
Water skis d + 15 25% (+2)
Jewelry d – 5 10% (+2)
a. Write two expressions in terms of d to show how much Winona and Takoda would pay in total if they buy their mother the set of power tools.
+2
b. What present does the expression 0.90(d – 5) refer to?
+1
c. Use the value d=$50. Calculate the Total Paid (+6pts see above) Column of each of the possible presents for the value of $50. Then star or circle the most economical or cheapest. (+1)
a. Two expressions to show how much Winona and Takoda would pay in total if they buy their mother the set of power tools:
- 0.85d + 2
- 0.85(d + 2)
b. The expression 0.90(d - 5) refers to the present of jewelry.
c. Calculating the Total Paid column for each possible present with d=$50:
- Power tools: 0.85(50) + 2 = $42.5 + $2 = $44.50
- Water skis: 0.85(50+15) + 2 = $57.375 + $2 = $59.375
- Jewelry: 0.90(50-5) + 2 = $43.5 + $2 = $45.50
The most economical or cheapest present is power tools with a total paid of $44.50.