milkshakegrande101
17.02.2020 •
Mathematics
PLEASE HELP
what is an equation of the line?
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Ответ:
The equation of line is
Option A is correct.
Step-by-step explanation:
We need to find the equation of the line.
Looking at the graph the two points are: (2,5) and (-2,-3)
We will first find the slope of these points using formula:
Here x₁ = -2, y₁=-3, x₂=2 and y₂=5
Putting values and finding slope
So, slope of the line is 2.
Considering that both lines are parallel (as not given in question). both lines will have same slope.
Now using Point slope form to find the equation.
Using point (-2,-3) and slope m= 2
So, the equation of line is
Option A is correct.
Ответ:
length = 9 in ; width = 4 in
Step-by-step explanation:
1) formula of the area of a rectangle
A = base x width
2) write an equation with the given informations:
w x (3w-3) = 36
3) solve the equation
- multiply W by 3w and -3
3w^2 -3w = 36
- divide the two members by 3
w^2 - w = 12
- add up -12 at the two members
w^2-w -12 = 12 -12
w^2 - w - 12 = 0
- find two numbers whose sum is -1 and whose product is -12 and factorise the equation
(w-4)(w+3) = 0
- find the two solutions
w-4 = 0
w = 4
w+3 = 0
w = -3
4)remember that a length can’t be negative.
w = 4 is the only solution
5) find the length
4x3 - 3 = 9