Step-by-step explanation:
perimeter is 4x+6 +20x-8=20x-2
area is 20x^2+22x-12
Answer:
y = 1
Step-by-step explanation:
A line with a slope of zero is a horizontal line parallel to the x- axis.
The equation of a horizontal line is
y = c
where c is the value of the y- coordinates the line passes through
The line passes through (0, 1) with y- coordinate of 1, thus
y = 1 ← is the equation of the line
9 students, 4 are selected and order doesn't matter:
Go to the 9th row of the triangle (mind you the first row is 0), the 2nd is 1st row
9th row: 1 9 36 84 126 126 84 36 9 1
Now choose the 4th column (excluding the 1st , you will get 126 :
so 126 is the number of combination requested:
PROOF: ⁹C₄ = 9!/(9-4)! .4! = (9!)/5!.4! = 126
The | | means absolute value
So, any negative or positive number in absolute value will ALWAYS come out positive.
|-4| = 4
But that's only half the question.
- |-4| = - (4) = -4
