Answer:
Step-by-step explanation:
Given
Required
Determine the equation of perpendicular line, r
First we need to determine the slope of the given equation
Make y the subject:
The general form of an equation is:
Where:
By comparison;
Since both lines are perpendicular:
We have:
to calculate the slope of the perpendicular line
Equation of the line can be solved using:
Where
So: the equation becomes
Solve for y
Hence:
The required equation is
Answer:
(Choice C) C Replace one equation with a multiple of itself
Step-by-step explanation:
Since system A has the equations
-3x + 12y = 15 and 7x - 10y = -2 and,
system B has the equations
-x + 4y = 5 and 7x - 10 y = -2.
To get system B from system A, we notice that equation -x + 4y = 5 is a multiple of -3x + 12y = 15 ⇒ 3(-x + 4y = 5) = (-3x + 12y = 15).
So, (-x + 4y = 5) = (1/3) × (-3x + 12y = 15)
So, we replace the first equation in system B by 1/3 the first equation in system A to obtain the first equation in system B.
So, choice C is the answer.
We replace one equation with a multiple of itself.
0.56 4 and below round it down, 5 and above round it up.
What grade is that is that 4th or 5th grade
