The mean temperature for the first 4 days in January was 7°C. The mean temperature for the first 5 days in January was 9°C. What was the temperature on the 5th day?
2 answers:
Answer:
11 C
Step-by-step explanation:
To find the mean (average), you have to add all and divide by 2, so if you reverse this, you get (7 + X)/2 = 9 , 9 * 2 - 7 = 11
Answer:
If the mean was 7 for the first 4 days that means the sum of temperatures of the first 4 days was 7 * 4 = 28. Similarly, the sum of temperatures of the first 5 days was 9 * 5 = 45 so that means that the temp. on the 5th day was 45 - 28 = 17°C.
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5/9 5 times 4= 20 12 times 3=36 20/36=5/9
You should add the two bases and muliply them with the height and then divide with 2 (14+18)×10÷2=160
2: 2/3; 3: 3/4; 4: 1/4; 5: 1/3; 6: 1/4; 7: 4/5; 8: 5/6-3/6=1/3
Answer:
1296°F
Step-by-step explanation:
950+346=1296
Hope this helps! : )
X+(x+1)+(x+2)+(x+3)+(x+4)+(x+5)=393 6x+15=393 6x=393-15 6x=378 x=63 third one is 63+2=65