nancylagunas805
22.04.2021 •
Mathematics
One of the legs of a right triangle measures 5 cm and its hypotenuse measures
9 cm. Find the measure of the other leg. If necessary, round to the nearest
tenth.
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Ответ:
Over the next 7 hrs, the temperature rose by 1/2°F for 7 hours, meaning it rose by (1/2)*7=(7/2)°F over the 7 hours.
Then, in the next 3 hours, it dropped by 2 1/4°F each hour. To do this by hand, convert 2 1/4 into an improper fraction. Multiply the denominator of the fraction part by the whole number: 2*4=8. Then add the numerator of the fraction to that value: 8+1=9. Put that final number of the denominator to get the improper fraction form of 2 1/4: 9/4. Now multiply 9/4 by 3: (9/4)*3=27/4. The temperature dropped by (27/4)°F over those 3 hours.
Finally do the math. Add (7/2)°F to 11°F, then subtract (27/4)°F. You should get 7.75 or 7 3/4°F as the final temperature.