Question

please help!! 1 medal and fan
Are the lines y=-x-4 and 5x+5y=20 perpendicular? Explain.

No; their slopes are not equal
Yes; the product of their slopes is -1.
No; their slopes are equal.
Yes; their slopes are equal.

Answer 1

first step is isolate the y on equation 5x +5y = 20, to find the slope

Answer 2

so you have 5y = -5x + 20, then divide all numbers by 5 and you get
y = -x + 4

Answer 3

so what is the slope on both equations

Answer 4

y=mx+b

Answer 5

correct, where m = slope

Answer 6

-5

Answer 7

no, the equations are

y = -x -4 and the other one we said it is y = -x + 4

Answer 8

so -x

Answer 9

so the answer is d

Answer 10

y=-x-4 is the same as y = -1x-4

it is of the form y = mx+b where m = -1 and b = -4

m is the slope, so the slope of y = -1x-4 is -1

Answer 11

and when two lines have the same slope, they are parallel lines (not perpendicular lines)

Answer 12

ok thanks guy