= 85d/100
= 0.85d.
Expression-2: total paid = 85% of d. or discount is 15% of d which is 0.15d. so total paid is d−0.15d
How did we arrive at these values?
B. This expression 0.90(d−5) refer to the total pay by Winona and Takoda if they want to buy their mother the jewelry
If you observe the table, there is the cost d-5 in jewelry.
And the discount is 10%. which is also represented as 10/100.
Therefore that total paid for jewelry becomes 0.90(d−5)
Other method:
Total paid = (d−5)−10% of d−5.
= (d−5)−(d−50)10/100
= (d−5)−(10d−50)/100
= 90d - 450/100
= 9d - 45/10
= 9(d-5)/10
= 0.90(d-5)
C. Let consider d =30.
1 total cost of power tools = 30
total paid of power tools = 0.85 (30)
= 25.5
2) Total cost of water skis = 30 + 15
= 45
Total paid water skis = 0.75(d+15)
= 0.75(45)
= 33.75
3) Total cost of jewelry = 30 − 5
=25⋅
Total paid of jewelry = 0.90 (25)
= 22.5
Based on the calculated amounts, Winona and Takoda should consider buying the jewelry as it has the lowest total cost among the three options. For d = 30, the total cost of jewelry is $22.50, making it the most budget-friendly choice.
Complete question:
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. 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. b. What does the expression 0.90(d-5) refer to? How do you know? How else could this expression be written? c. Choose a value for d that is greater than $25 and less than $100. Calculate the total cost of each of the possible presents for the value you chose. Then write a short paragraph telling Winona and Takoda which present they should buy and explaining why.