Answer:
y=-x+4
Step-by-step explanation:
3-5/1-(-1) = -1
(y-(-1)) = -1(x-5)
y+1 = -x+5
y= -x +5-1
y= -x + 4
First you need to find the highest common factor of 5x² and 25, which is 5 because there is no x term in 25. This means that 5 goes on the outside of the brackets, like 5 (______). To get 5x² from 5, you need to multiply by x², which is your first term in the brackets. To get 25 from 5, you need to multiply by 5, which would be your second term, so your final answer is 5(x² + 5). I hope this helps!
Subtract 7.75 by both sides then. subtract y both sides. you need x and y to be on one side. 5/2x-y=-7.75
<em>PQR = 150°</em>
- <em>Step-by-step explanation:</em>
<em>Hi there ! </em>
<em>PQR = PQS + SQR</em>
<em>12x - 6 = 16 + 9x + 17</em>
<em>12x - 9x = 16 + 17 + 6</em>
<em>3x = 39</em>
<em>x = 13</em>
<em>PQR = (12×13 - 6)° = (156 - 6)° = 150°</em>
<em>Good luck !</em>
Answer:
(1)
(2)
Step-by-step explanation:
Solving (1):
(a): Mean
This is calculated as:
So, we have:
Solving (b): The variance
This is calculated as:
Where:
and 
So, we have:
So, we have:
Solving (c): The standard deviation.
This is calculated as:
Solving (2):
(a): Mean
This is calculated as:
So, we have:
Solving (b): The variance
This is calculated as:
Where:
and
So, we have:
So, we have:
Solving (c): The standard deviation.
This is calculated as:
