1. Which equation represents a line that is perpendicular to the line represented by 2x - y =7

Step-by-step explanation:

Given:

2x−y=7

Matching given equation with the variables,

a=2

and

b=−1 .

Swap "a" and "b"

-x + 2y = 7

Because b is negative, let's change that one:

x + 2y = 7

Is perpendicular to

2x−y=7

. Here is a graph to prove it:

The red line is

2x−y=7

The blue line is

x+2y=7

If you want the perpendicular line to go through a given point, then make the constant term on the right a variable (for example k)

x+2y=k

Now lets make the perpendicular line go through the point

(1,1)

by substituting 1 for x, 1 for y and the solving for k:

1+2(1)=k

k=3

The equation of the line that perpendicular to

2x−y=7 and goes through the point

(1,1)is:

x+2y=3

Please mark me as brainleist.

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x