The temperature at the end of the day was 64 degrees. The temperature had increased twice during the day, once by 8 degrees and another time by 4 degrees. Which expression shows what the temperature was at the start of the day
Let's call the temperature at the start of the day x degrees.
After the first increase, the temperature becomes x+8 degrees.
After the second increase, the temperature becomes x+8+4 degrees.
Given that the temperature at the end of the day was 64 degrees, we can set up the equation:
x + 8 + 4 = 64
Combining like terms:
x + 12 = 64
Subtracting 12 from both sides:
x = 52
Therefore, the expression that shows what the temperature was at the start of the day is x = 52 degrees.
Let's denote the initial temperature at the start of the day as "x".
According to the given information, the temperature increased twice during the day. The first increase was by 8 degrees, and the second increase was by 4 degrees.
Therefore, starting from the initial temperature, the first increase brings the temperature to x + 8 degrees. Then, the second increase brings the temperature from the previous temperature to (x + 8) + 4 degrees.
So, the final temperature at the end of the day is (x + 8) + 4 = x + 12 degrees.
We also know that the final temperature at the end of the day was 64 degrees.
So, we can set up an equation to find the initial temperature, x:
x + 12 = 64
To solve for x, we isolate it:
x = 64 - 12
Therefore, the initial temperature at the start of the day was 52 degrees.
The expression that shows what the temperature was at the start of the day is x = 52.
To find the temperature at the start of the day, we need to subtract the total increase in temperature from the temperature at the end of the day.
First, let's find the total increase in temperature. The temperature increased by 8 degrees and then increased again by 4 degrees. So the total increase is 8 + 4 = 12 degrees.
Now, we subtract the total increase from the temperature at the end of the day to find the temperature at the start of the day.
Temperature at the start of the day = Temperature at the end of the day - Total increase
Temperature at the start of the day = 64 degrees - 12 degrees
Therefore, the expression that shows the temperature at the start of the day is 64 - 12.