Answer:
The temperature on the 5th day was of -9ºC.
Step-by-step explanation:
Mean of a data-set
The mean of a data-set is the sum of all values in the data-set divided by the number of values.
The mean temperature for the first 4 days in January was 1°C.
This means that during the first 4 days, the sum of the temperatures was 4*1 = 4ºC.
The mean temperature for the first 5 days in January was -1°C.
First 4 days: Sum of 4º
5th day: Temperature of x.
The mean is -1, so:
The temperature on the 5th day was of -9ºC.
Answer:
Point of intersection:
2 × equation(b) + equation (a):
Point of intersection = (3, 1)
Perpendicular line:
General equation of line:
<u>Value</u><u> </u><u>of</u><u> </u><u>m</u><u>:</u>
<u>
</u>
Answer:
x>-2
Step-by-step explanation:
-9x-15<3
+15<+15 add 15 to both sides
_________
-9x<18
÷-9 <÷-9 divide both sides by -9, switch inequality _________ symbol when dividing by negative number.
x>-2 Answer
_________
Step-by-step explanation:
there are 3.48 cups of water in 4 cups of skim milk
hope it helps!
Answer:
1. 
2. 
3. 
Step-by-step explanation:
The equation of the line that passes trough the points A(14,-1) and B(2,1) is
The y-intercept of this line is
Line BC is perpendicular to line AB, then its slope is 
Line BC passes through the point B, so
If the y-coordinate of point C is 13, then x-coordinate is
