Your classmate is starting a new fitness program. He is planning to ride his bicycle 50 minutes every day. He burns 7 calories per minute bicycling at 11 mph and 10.75 calories per minute bicycling at 15 mph. How long should he bicycle at each speed to burn 500 ​calories?

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b

20%

step-by-step explanation:

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step-by-step explanation: