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GREYUIT [131]
3 years ago
9

isosceles trapezoid jklm has legs JK and LM and base KL if JK=8x-9, kl=7x+10 and LM=10x+2 find the value of x

Mathematics
1 answer:
devlian [24]3 years ago
5 0
The domain:
8x-9 > 0\to 8x > 9\to x > \dfrac{9}{8}\\\\7x+10 > 0\to 7x > -10\to x > -\dfrac{10}{7}\\\\10x+2 > 0\to 10x > -2\to x > -0.2\\\\D:x\in\left(\dfrac{9}{8};\ \infty\right)

If the trapezoid JKLM is an isosceles trapezoid then the legs are congruent.
|JK|=|LM|\to 8x-9=10x+2\ \ \ |+9\\\\8x=10x+11\ \ \ |-10x\\\\-2x=11\ \ \ |:(-2)\\\\x=-5.5\notin D

Answer: <span>Such a trapezoid does not exist.</span>


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a submarine travels at an elevation of -75 3/4 ft relative to sea level then its elevation changes by - 16 3/8 what is the new e
slamgirl [31]

Answer:

New = -92\frac{1}{8}

Step-by-step explanation:

Given:

x = -75\frac{3}{4} --- Position

\triangle x = -16\frac{3}{8} --- Change

Required

Find the new position

The new position is calculated as:

New = x + \triangle x

New = -75\frac{3}{4} - 16\frac{3}{8}

New = -75.75 - 16.375

New = -92.125

New = -92\frac{125}{1000}

New = -92\frac{1}{8}

3 0
3 years ago
Can someone please help me I don’t understand this pleaseeeeeeee:( thanks Find the area of this shape:
Alla [95]

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5 0
3 years ago
Prove that Quadrilateral ABCD is a Rhombus <br> show all the work
Bezzdna [24]

Answer:

Say that the shape is a parallelogram with equal length sides;

AB = CD

ABD = CDB as the bisecting lines (you have drawn) prove ABD : CDB are both isosceles triangles.

Therefore ABD = ADB

Draw the shape's diagonals as each others' perpendicular bisectors;  

Draw the shape's diagonals bisect both pairs of opposite angles.

If two non congruent angles were given in example 70 degree and 110 degree then say M ∴ = (1/2 )(M∴BAD) = 35  =  (1/2 )(M∴BEF) = 35

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5 0
3 years ago
Pls answer asap, brainilest will be given to best answer, and best explanation.
juin [17]

Answer:

it should be D

Step-by-step explanation:

because A is going at y=30x, and B is slower than it. So there's only one choice that matches. which is y=15x

3 0
3 years ago
In the triangle below the value of h is 3/4 the side length labeled on the figure. What is the area of the triangle ?
Molodets [167]
I'm not sure if this is the answer, but this is how I solved it. 
A= 1/2 bh (area of a triangle) (1/2 times base times height)
A=1/2 * 3/4
A=3/8?
Do have the picture of the triangle by any chance?
7 0
3 years ago
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