Answer:
a = 7
Step-by-step explanation:
Using Pythagoras' identity in the right triangle,
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is
a² + b² = c² , substitute values
a² + 2.4² = 7.4², that is
a² + 5.76 = 54.76 ( subtract 5.76 from both sides )
a² = 49 ( take the square root of both sides )
a = = 7
Answer: the answer is y=171
(-6+k)/2=-9
Step 1: Simplify both sides of the equation.
(−6+k)/2=−9, 1/2k-3=−9
Step 2: Add 3 to both sides.
1/2k=-6
Step 3: Multiply both sides by 2.
k=12
Hope that helps!
Answer:
how much your talking... lol
Step-by-step explanation:
Answer:
Variance σ² having standard deviation 2.5 is 6.25.
Step-by-step explanation:
The standard deviation is basically the square root of the variance.
So, if want to find the variance of the data we simply take square of standard deviation to get the variance of data.
standard deviation = σ = 2.5
taking square on both sides
(σ)² = (2.5)²
σ² = 6.25
So, variance σ² having standard deviation 2.5 is 6.25.