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3 years ago

Find the perimeter of the rectrangle with vertices at R(-2, 3), S(4, 3), T(4, -1) and U(-2, -1).

Mathematics

1 answer:

mylen [45]3 years ago

5 0

I attached a photo where I graphed these vertices in order to count the length and width. After counting the number of units between R & U I got a width of 4. And then I counted the units between S & T to get a width of 6. Using the formula to calculate the perimeter of a rectangle, P = 2(l+w). The perimeter is 20.

First I added the length plus the width, 4 + 6 and got 10. Then I did 10 x 2 which is how I got a perimeter of 20.

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1.Write an equation of the line in point-slope

Oduvanchick [21]

Answer:

Point slope form

$y-10 = -6 (x+1)$

Slope-intercept form

$y=-6x+4$

Standard form

$4x+y=4$

Step-by-step explanation:

Equation in Point slope form is

$y-y_1=m (x-x_1)$ ---------- (1)

Here

$m=-5 \ \ \ and \ \ \ (x_1, y_1) = (-1, 10)$

Substituting values in equation (1)

$y-10 = -6 (x+1)$ ------------- (2)

Equation (2) is equation of line in point slope form.

Re-arranging equation (2)

$y = -6x - 6 + 10$

$y=-6x+4$ ----------- (3)

Equation (3) is equation of straight line in slope-intercept form

Re-arranging equation (3)

$4x+y=4$ --------(4)

Equation (4) is equation of line in standard form

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3 years ago

What's the area of a square picture with 16 inch sides

Aneli [31]

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5 0

3 years ago

Read 2 more answers

Line m passes through the points (-2,7) and (4,-5), as shown below. Which of the following could be the equation of a line that

True [87]

Slope-intercept form: y = mx + b

(m is the slope, b is the y-intercept or the y value when x = 0 --> (0, y) or the point where the line crosses through the y-axis)

For lines to be parallel, they need to have the same slope.

To find the slope (m), use the slope formula:

$m=\frac{y_2-y_1}{x_2-x_1}$ And plug in the two points

(-2, 7) = (x₁, y₁)

(4, -5) = (x₂, y₂)

$m=\frac{y_2-y_1}{x_2-x_1}$

$m=\frac{-5-7}{4-(-2)}$ (two negative signs cancel each other out and become positive)

$m=\frac{-5-7}{4+2}$

$m=\frac{-12}{6}$ Simplify the fraction

m = -2

The slope is -2, so the parallel line's slope is also -2.

Your answer is C

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3 years ago

5 What is the perimeter? use 3,14

Lera25 [3.4K]

Answer:

I don't understand the instructions, but I'll answer the question in the picture.

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Thus, y=38

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2 years ago

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