Answer: she scored 69 points on the second test.
Step-by-step explanation:
Let x represent the number of points that she scored in the first test.
Let y represent the number of points that she scored in the second test.
If her mean score was 75, it means that
(x + y)/2 = 75
x + y = 75 × 2
x + y = 150- - - - - - - - - 1
If she scored 12 points more on the first test than the second test, it means that
x = y + 12
Substituting x = y + 12 into equation 1, it becomes
y + 12 + y = 150
2y + 12 = 150
2y = 150 - 12
2y = 138
y = 138/2
y = 69
12 and 3/8 or if you want it entirely in a fraction 99/8.
Answer:
Step-by-step explanation:
Given the expressions all that is required is to expand them (using the distributive property) to see which answers they match up to:
For a: 
For b: 
For c calculate the square of a sum: 
(add like terms) c: 
For d: 
Answer:
point B
Step-by-step explanation:
First you find (-2, -1) on the graph then you go up two units. there is not a point directly above (-2, -1) but if you look to the side B is exactly 2 units above which is what the question asked for.
