Answer: There are 4 students in the group.
Step-by-step explanation:
Let the number of students in the group be n
If one of them scored 9 more points , their average score would be 81 points.
So, our equation (1) will be
Similarly,
If one of them scored 3 points less, their average score would be 78 points.
So, our equation (2) will be
So, from equation (1) and (2) we get:
Hence, there are 4 students in the group.
5x - 4 -9x + 7
simplify
5x - 9x = -4x
-4 + 7 = 3
Answer: -4x - 3
Answer:
Divide 6 miles by 0.5 hour: 6/0.5 = 12 miles per hour.
Step-by-step explanation:
Answer:
43 degrees.
Step-by-step explanation:
Since the triangles are congruent their corresponding parts ( sides and angles) are congruent
m < P = m < K = 43 degrees
Answer:
y=x-2
Step-by-step explanation:
If you have drawn the graph of 
.
To determine the equation of the line which should be drawn to solve the equation: x² - 4x +3=0
Simply carry out the subtraction: 
The equation of the line which should be drawn is: y=x-2
What this means is simply:
If
