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Brums [2.3K]
2 years ago
7

Solve the questions in order

Mathematics
1 answer:
PtichkaEL [24]2 years ago
8 0
3.) A. 125
4.) B. 125
5.) B. 2,000
6.) D. 40
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The mean temperature for the first 4 days in January was 8°C. The mean temperature for the first 5 days in January was 7°C. What
mote1985 [20]

Answer:

The temperature of the 5th day was 3°C

Step-by-step explanation:

Mean temperature of the first 4 days = 8°C

Note that:

Mean = Sum of temperatures ÷ number of days

∴ 8 = sum of temperature ÷ 4

= 8 = \frac{sum\ of\ temperatures}{4}

= sum\ of\ temperatures\ = 8\ \times\ 4 = 32

Therefore the sum of the first 4 days = 32

Let the temperature of the next day (the fifth day) be m

Hence,

sum of the temperatures of first 5 days = 32 + m - - - - (1)

Next, the sum of the first 5 days can be calculated from the given average of the first 5 days as follows:

Mean temperature of the first 5 days = 7

Mean = \frac{sum\ of\ temperatures}{number \ of\ days}\\\\7 = \frac{sum\ of\ temperatures}{5} \\sum\ of\ temperatures\ = \ 7\ \times\ 5\ = 35\\sum\ of\ temperature\ of\ the\ first\ 5\ days\ =\ 35 - - - - - (2)

Now, you will notice that equation (1) = equation (2)

∴ 32 + m = 35

m = 35 - 32 = 3

therefore, the temperature of the 5th day was 3°C

4 0
3 years ago
What percent is 7.2 of 19.5
allochka39001 [22]

Answer:

36.92 but rounded it up its 37

Step-by-step explanation:

Solution for 7.2 is what percent of 19.5:

7.2:19.5*100 =

(7.2*100):19.5 =

720:19.5 = 36.923076923077

Now we have: 7.2 is what percent of 19.5 = 36.923076923077

6 0
2 years ago
Read 2 more answers
3 hours 20 minutes - 1 hour 48 minuets <br> A. 2.12<br> B. 2.52<br> C. 1.32<br> D. 1.53
chubhunter [2.5K]
3 hours and 20 minutes minus 1 hour and 48 minuets equals an hour and 32 minutes. There are 60 minuets in an hour and 60 divided by 32 is 0.53. This means that your final answer is:
D. 1.53
5 0
3 years ago
What is 45/89+100-23<br> need help
morpeh [17]

Answer:

The answer is 77.50561

Step-by-step explanation:

Do 45 divided by 89, add 100, and subtract 23. Hope this helps!

8 0
3 years ago
Given that point j is the incenter of triangle nop, find jk if jm = x-2 and jl = 3x - 8
mafiozo [28]
Its 3. I hope this helps
5 0
3 years ago
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