3 years ago

Help me this is important

Mathematics

2 answers:

Karolina [17]3 years ago

7 0

The third option is correct

inn [45]3 years ago

5 0

Let the width be w.

Length is 5 more than twice width, = 2w + 5.

Area = 50

l*w = 50

(2w + 5)w = 50

w(2w + 5) = 50

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<u>ANSWER TO PART A</u>

The given triangle has vertices $J(-4,1), K(-4,-2),L(-3,-1)$

The mapping for rotation through $90\degree$ counterclockwise has the mapping

$(x,y)\rightarrow (-y,x)$

Therefore

$J(-4,1)\rightarrow J'(-1,-4)$

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We plot all this point and connect them with straight lines.

ANSWER TO PART B

For a reflection across the y-axis we negate the x coordinates.

The mapping is

$(x,y)\rightarrow (-x,y)$

Therefore

$J(-4,1)\rightarrow J''(4,1)$

$K(-4,-2)\rightarrow K''(4,-2)$

$L(-3,-1)\rightarrow L''(3,-1)$

We plot all this point and connect them with straight lines.

See graph in attachment

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