Number 40 Algebra 1
If the temperature on a January day is 0° F at 7:00 a.m., increases by 14° by noon, and then decreases 20° from noon to 10:00 p.m. what is the temperature at 10:00 p.m.
To find the temperature at 10:00 p.m., we need to start with the initial temperature of 0°F at 7:00 a.m. and then account for the increase and decrease during the day.
From 7:00 a.m. to noon (5 hours), the temperature increases by 14°F.
So, the temperature at noon is 0°F + 14°F = 14°F.
From noon to 10:00 p.m. (10 hours), the temperature decreases by 20°F.
So, the temperature at 10:00 p.m. is 14°F - 20°F = -6°F.
Therefore, the temperature at 10:00 p.m. is -6°F.
To find the temperature at 10:00 p.m., we need to start with the temperature at noon and then subtract the decrease of 20° from noon to 10:00 p.m.
Given:
Temperature at 7:00 a.m. = 0°F
Increase by 14° from 7:00 a.m. to noon
Decrease by 20° from noon to 10:00 p.m.
Step 1: Start with the temperature at noon.
The temperature at noon would be 0°F + 14°F = 14°F.
Step 2: Subtract the decrease from noon to 10:00 p.m.
14°F - 20°F = -6°F.
Therefore, the temperature at 10:00 p.m. would be -6°F.