3 years ago

10. The figure below is a uniform cross-section of a hall 20 m long and 7 m wide.

Mathematics

1 answer:

tamaranim1 [39]3 years ago

5 0

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Find the perimeter of quadrilateral ABCD with vertices A(-2,-2), B(-1,3),

drek231 [11]

Answer:

Step-by-step explanation:

Step one

given the coordinates

ABCD with vertices A(-2,-2), B(-1,3), C(5, 3), and D(4, -2)

AB=(-2,-2),(-1,3)

BC=(-1,3), (5, 3)

CD=(5, 3),(4, -2)

DA=(4, -2),(-2,-2)

The distance between points AB=

$AB= \sqrt (x_2-x_1)^2+(y_2-y_1)^2$

$AB= \sqrt (-1+2)^2+(3+2)^2\\\\AB= \sqrt 1^2+(5)^2\\\\AB= \sqrt26\\\\AB=5.1$

The distance between points BC=

$BC= \sqrt (5+1)^2+(3-3)^2\\\\BC= \sqrt 6^2+(0)^2\\\\BC= \sqrt36\\\\BC=6$

The distance between points CD

$CD= \sqrt (4-5)^2+(-2-3)^2\\\\CD= \sqrt -1^2+(-5)^2\\\\CD= \sqrt26\\\\CD=5.1$

The distance between points DA

$DA= \sqrt (4+2)^2+(-2+2)^2\\\\DA= \sqrt 6^2+(0)^2\\\\DA= \sqrt36\\\\DA=6$

Hence the perimeter = 5.1+6+5.1+6

= 22.2

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3 years ago

water evaporates at a rate of 1.5 ounces per day from a container that holds 34 ounces when full. which expression represents th

Mrrafil [7]

The expression would be 34 - 1.5d
34 ounces minus 1.5 ounces multiplied by d (the amount of days that have gone by.)

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Lorico [155]

Answer:

i have no idea.

Step-by-step explanation:

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Natalija [7]

Answer:

Step-by-step explanation:

10% = 6

⬇️ x3

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Fiesta28 [93]

Answer:

x-intercept: -1

y-intercept: 0.5

Step-by-step explanation:

The intercept for each is where the other coordinate is at 0.

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1 year ago