−10x + 1 + 7x = 37
-10x+7x+1=37
-3x+1= 37
Move +1 to the other side. Sign changes from +1 to -1.
-3x+1-1= 37-1
-3x=36
Divide by -3.
-3x/3= 36/-3
x= -12
Answer : x= -12
Answer:
2.104
Step-by-step explanation:
Data provided in the question:
For sample 1,
n₁ = 110
μ₁ = 94
s₁ = 14
For sample 2,
n₂ = 85
μ₂ = 72
s₂ = 15
Now,
Standard error = 
or
Standard error = 
or
Standard error = √4.43
or
Standard error = 2.104
The answer is C. C=-1
-4(-1)= 4 a negative times a negative is positive
4+5 is 9
Answer:
x = 6, y = -8
Step-by-step explanation:
First we take the equations side by side and put them like this:
6x + 2y = 16
+ 2x - 2y = 32
8x = 48
Then solve for x.
x = 6
Then insert x back into either equation
2(5) - 2y = 32
10 - 2y = 32
solve for y,
y = -10
To find the average, add the cost of each book to get a total cost, then divide the total cost by the number of books purchased.
Total cost: 32 + 45 + 39 = 116
Average cost: 116 / 3 = 38.67
