All of the equations contain -4 in their range.
A) -4 = sqrt(x) - 5
1 = sqrt(x)
x = 1; valid
B) -4 = sqrt(x) + 5
-9 = sqrt(x)
x = 81; valid
C) -4 = sqrt(x + 5)
16 = x + 5
x = 11; valid
D) -4 = sqrt(x - 5)
16 = x - 5
x = 21
I believe the equations contain square instead of square root, in which case the answer would be A because no other could have a negative range.
Answer:
The scores within one standard deviation of the mean are: 77, 79, 80, 83, 87, 88
Step-by-step explanation:
The mean of the data is 83 and the standard deviation is 6.5, find scores within 1 standard deviation of the mean:
Between
83 - 6.5 = 76.5
83 + 6.5 = 89.5
So:
The scores within one standard deviation of the mean are: 77, 79, 80, 83, 87, 88
Answer:
4x + 1
Step-by-step explanation:
y = 2x² + x + 2
dy/dx = 2(2x¹) + 1 + 0
dy/dx = 4x + 1
Each side of the square is 7 cm (I found the square root of 49).
Then multiply this by 4 (or add by four) to get the perimeter.
4 x 7 = 28 cm
This means the perimeter is 28 cm. Hope this helps :)
Answer:
2500
Step-by-step explanation:
[8*(3+4-1)+2]^2
First calculate the number inside the round parenthesis as this operation as priority:
3+4-1=6
Then multiply this by 8 because now the multiplication has the highest priority:
8*6=48
Now you can add the 2 to the number you got:
48+2=50
Finally square the number obtained to get the answer:
50^2= 2500
