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vodomira [7]
3 years ago
13

Write the equation for a line perpendicular to a line passing through points (-1,2) and (1,-8)

Mathematics
1 answer:
soldi70 [24.7K]3 years ago
3 0

Answer:

Step-by-step explanation:

Slope m = (-8-2)/(1+1)=-10/2 = -5

Perpendicular slope-1/m = -1/-5 = 1/5

Equation of a line with perpendicular slope is

y-y1=(-1/m)(x-x1)

y - 2 = (1/5)(x+1)

y =2 +(1/5)(x+1)

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An electric company charges a certain rate per kilowatt-hour (kWh) of electricity used and an administrative fee of $3.50. The c
Triss [41]

Answer:

Variable r represents the slope of the equation.

Step-by-step explanation:

Given that the administrative fees that company charge is $3.50.

Also, the Zhao has a bill of $63.25.

The equation used by Zhao is

63.25=r(800)+3.50

We can compare the equation of a line in the slope-intercept form.

y=mx+c

We can see the y-intercept is $3.50 that is a fixed cost. And the company charged $63.25 that is the dependent variable.

Also, variable r that is the rate per kilowatt-hour (kWh) represents the slope of the equation.

4 0
3 years ago
A rectangular soccer field is 80 meters wide and 110 meters long. The coach asks players to run from one corner of the field to
seraphim [82]

Answer:

Step-by-step explanation:

Goven the length of the field = 110m

Width = 80m

The length of the diagonal is expressed using the pythagoras theorem;

d² = l² + w²

d² = 110² + 80²

d² = 12100 + 6400

d² = 18500

d = √18500

d = 136.01

Hence the players have to run 136.01m diagonally

7 0
3 years ago
Four students did a 400 meter sprint relay. Henry's time was 51.10 seconds, Cathryn's time was 45.26 seconds, Grayson's time was
mylen [45]

Answer:

260.42 you add them because it want the total time of all of them

Step-by-step explanation:

8 0
3 years ago
Identify the slope and intercept of the following linear equation.
Goryan [66]

Answer:

A)

Step-by-step explanation:

y=3/4x-2

y=mx+b where m=slope and b=y-intercept,

m=3/4 and b=-2

8 0
4 years ago
What is the y-value to the solution of y = 5x -4 and y = 2x + 8
Fiesta28 [93]

Answer:

At the bottom!

Step-by-step explanation:

Put the two equations into the same standard form:

2x-y=8

-5x+2y=3

Now if you add the two equations up, guess what will happen?

You will "eliminate" the y variable, and only be left with the x variable.

Technically, you will get:

2x-y+2+28-5x+29+2y=8+23

-3x+20y=11

-3x=11

6 0
3 years ago
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