Cross Products Answers
Why are the solutions to the proportions and the same?
A car traveled 63 miles on 3 gallons of gas. What proportion can you set up to determine how many miles, m, the car can travel on 7 gallons of gas?
Why are the solutions to the proportions and the same?
Why is x = 4 a solution to the proportion ?
Why can you use cross products to solve the proportion for x?
What is the value of x in the proportion ?
Which equation could you use to solve for x in the proportion ?
What is the solution to the proportion? Round the answer to the nearest tenth if necessary.
Isabella worked 50 hours over the past two weeks, and she gets paid by the hour. During the first week of the two-week span, she worked 30 hours and got paid $285.00. How much did she get paid during the second week of the two-week span?
Joanie believes that you cannot use cross products to solve the proportion for x. She says that if you multiply both sides of the equation by x, you get . Then, if you multiply both sides of the equation by 3, you get , which is a different equation than you would get if you cross multiplied. What mistake did Joanie make in her reasoning?
Javed downloaded from the Internet two files that had a combined size of 696 megabytes. The size of the first file was 290 megabytes, and it took 5 minutes to download. Assuming that the files downloaded at a constant speed, how long did it take for the second file to download?
Setting equal to which ratio would result in a valid proportion?
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