A. The expressions to show how much Winona and Takoda would pay in total if they buy their mother the set of power tools are:
1. Total cost with discount: D - 0.15D
2. Total paid: (1 - 0.15)D
B. The expression 0.90(D - 5) refers to the total amount paid for jewelry after the discount of 10%. I know this because multiplying a number by 0.90 represents a 10% discount. This expression could also be written as 0.9D - 4.5.
COMPLETE THE FOLLOWING QUESTIONS.
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%
WATER SKIS D + 15 25%
JEWELRY D - 5 10%
A. WRITE TWO EXPRESSIONS IN TERMS OF D TO SHOW HOW MUCH WINONA AND TAKOTA 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?
1 answer
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