Slope-intercept form:
y = mx + b "m" is the slope, "b" is the y-intercept
For lines to be perpendicular, their slopes have to be the opposite/negative reciprocal (flipped sign and number)
For example:
slope is 2
perpendicular line's slope is -1/2
slope is -3/4
perpendicular line's slope is 4/3
#1: The slopes are the same, meaning they are parallel lines
#2: First isolate the "y" in the first equation
-4x + 5y = -5
5y = -5 + 4x
y = -1 + 4/5x They are not perpendicular because the slopes are 4/5 and -4/5
#3: Isolate "y" in the second equation
8y = 3x - 32
y = 3/8x - 4 They are perpendicular
#4: Isolate "y" is the 1st equation
10y = -9x
y = -9/10x They are parallel lines
The 3rd choice is your answer
Answer:the answer is B
Step-by-step explanation:
Answer:
x=2.25
Step-by-step explanation:
- 8=2(x-5)+6x
- 8=2x-10+6x
- 8+10=2x+6x
- 18=8x
- 18/8=x
- 2.25=x
Answer:
Who is gibby
Step-by-step explanation:
The answer is C (-2.2, -3).
In order to find the ordered pair we must use what we know from the first equation in the second. We already know that y = -3, so that goes into the second equation.
y = x - 0.8
-3 = x - 0.8
-2.2 = x
