At 10:00 a. m. the temperature is –3.4°F. The temperature increases 0.5°F each hour for the next 6 hours. If the temperature drops a total of 5.3°F over the following 3 hours, what is the temperature at 7:00 p. m.? please give an explanation too!

-16.3

Step-by-step explanation:

First multiply 0.5 by 6 since the six hours and every hour is 0.5 degrees less or you can add 0.5 six times. You then take the answer which would be 3 and add 3 to -3.4 resulting in -0.4. Afterwards you would take -0.4 and subtract 5.3 degrees three times. This gives you -16.3 degrees. You would be at 7:00 PM because 10:00 a.m. plus six hours would be 4 o'clock and the next 3 hours would add on to 7.

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.