Mrs. Bosch's science club left the school on a bus at 7:48 a. m. to go to Orlando. Mrs. Bosch drove her own car and did not leave the school until 8:40 a. m. The bus traveled at an average rate of 80 kilometers per hour. What was Mrs. Bosch's average speed, to the nearest kilometer per hour, if she met up with the bus when they stopped for lunch at 1:00 p. m.?

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

5+2x=a

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