The mean temperature for the first 4 days in january was 9°c the mean temperature for the first 5 days in january was 7°c. what was the temperature on the 5th day?

-1°C

Step-by-step explanation:

Now we are given the mean temperature for the first 4 days in January was 9°C

So,

Now we are given that  the mean temperature for the first 5 days in January was 7°C

So, Temperature on 5th day = Sum of temperatures of first 5 days -Sum of temperatures of first 4 days

Temperature on 5th day = 35°C-36°C = -1°C

Hence the temperature on the 5th day was -1°C

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.