Answer: it’s a
Step-by-step explanation:
B, there are 1000m in a km.
The intermediate step of x² - 4x = 45 is (x- 2)² = 49
<h3>How to determine the intermediate step?</h3>
The equation is given as:
x² - 4x = 45
Take the coefficient of x
k = -4
Divide by 2
k/2 = -2
Square both sides
(k/2)^2 = 4
Add 4 to both sides of x² - 4x = 45
x² - 4x + 4= 45 + 4
This gives
x² - 4x + 4= 49
Express as perfect square
(x- 2)² = 49
Hence, the intermediate step of x² - 4x = 45 is (x- 2)² = 49
Read more about quadratic equations at:
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So what you would want to do is plot the points in a graph, when you do so you line the points and it will give you a triangle.
So in conclusion it should be, a.) Isosceles
Answer:
The variance is
Step-by-step explanation:
From the question we are told that
The sample size is n = 21
The sum of squares is
Generally the variance is mathematically represented as
substituting values