Good luck cause I’m in the same situation
Answer:
D. 24.7
Step-by-step explanation:
First off we need to find the Mean of the data set. We take sum of all the data in the set and divide it by the number of sample in the data set.
Now we find the variance using the formula:
σ²=Σ(x-Mean)²
n-1
σ²=
σ²=
σ²=611.07
Now that we have the variance, we can use the variance to solve for the standard deviation by getting the square root of the variance.
SD=
SD=24.72
Answer: x= 1/5
3/4x +1/4 =2x
1/4= 1 1/4x or 1.25x (minus 3/4x on both side)
1/5=x
The figure shows a right triangle at each corner with legs 3 and b and hypotenuse 4. The Pythagorean theorem tells you the sum of the squares of the legs is equal to the square of the hypotenuse:
3² + b² = 4² . . . . . . put the numbers into the Pythagorean formula
9 + b² = 16 . . . . . . . evaluate the squares
b² = 16 - 9 = 7 . . . . subtract 9 to isolate the variable
b = √7 . . . . . . . . . . undo the square operation by taking the square root
The infield of a baseball stadium is diamond shaped, which means each side is the same length.
If the whole area of the diamond is 81 inches, then each side has to be 9 inches.
A = b²
81 = b²
√81 = b
9 = b
