Mario received y text messages each minute for 10 minutes yesterday, and received t text messages each minute for 20 minutes today. What is the total number of text messages he received for two days in terms of y and t?
Correct answer: D. 10y+20t
- A. 30yt
- B. 200yt
- C. 20y+10t
- D. 10y+20t
Explanation
To find the total number of text messages Mario received for two days, calculate the messages for each day separately:For yesterday, with y messages each minute for 10 minutes, Mario received a total of 10y messages.For today, with t messages each minute for 20 minutes, Mario received a total of 20t messages.Therefore, the total number of messages for two days is 10y + 20t.Options A and B are incorrect as they do not consider the given times for each day. Option C is incorrect due to the incorrect placement of coefficients for y and t. The correct answer is Option D because it correctly calculates the total messages received by considering the specific times for each day.
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Quantitative reasoning applies arithmetic and basic algebra to numerical relationships, including percentages, ratios, averages, fractions, proportions, profit and loss, rates, time, work and measurement. Questions focus on translating words into equations, choosing an efficient method and checking whether the result is numerically reasonable.
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